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- Published: 29 March 2019
Over-exploitation of natural resources is followed by inevitable declines in economic growth and discount rate
- Adam Lampert ORCID: orcid.org/0000-0001-8115-6688 1 , 2
Nature Communications volume 10 , Article number: 1419 ( 2019 ) Cite this article
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- Environmental economics
- Sustainability
A major challenge in environmental policymaking is determining whether and how fast our society should adopt sustainable management methods. These decisions may have long-lasting effects on the environment, and therefore, they depend critically on the discount factor, which determines the relative values given to future environmental goods compared to present ones. The discount factor has been a major focus of debate in recent decades, and nevertheless, the potential effect of the environment and its management on the discount factor has been largely ignored. Here we show that to maximize social welfare, policymakers need to consider discount factors that depend on changes in natural resource harvest at the global scale. Particularly, the more our society over-harvests today, the more policymakers should discount the near future, but the less they should discount the far future. This results in a novel discount formula that implies significantly higher values for future environmental goods.
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Introduction.
The exploitation of ecosystems by humans has long-lasting consequences for the future provision of natural resources and ecosystem services 1 , 2 . This may negatively affect the provision of food, increase health hazards and risks of natural disasters, and more. Degraded ecosystems may be slow to recover or may not recover naturally even after their exploitation stops 3 , 4 , 5 . Consequently, the availability of natural resources such as food, clean air, and other ecosystem services, may be adversely impacted for extended periods if the ecosystems providing these resources become degraded. For example, the emission of greenhouse gases may affect the global climate for centuries 6 , 7 ; invasive species and diseases may irreversibly damage ecosystems 8 , 9 ; and the non-sustainable harvest of fisheries and forests may leave these systems degraded for decades 2 , 4 , or even lead to their irreversible and permanent degradation 3 , 10 . Since natural resources are limited, it has been widely recognized that a transition to sustainable harvest is necessary 11 . What the optimal pathway and speed are for this transition, however, constitute the focus of an ongoing debate. For example, it has been suggested that an abrupt transition may slow economic growth in developing countries and may negatively affect production 12 , and that rapid emission cuts may create energy deficits before we manage to develop viable substitutes 13 .
Determining the optimal strategy for the adoption of sustainable management over time requires cost-benefit analyses. A common approach is to consider a social planner whose objective is to maximize social welfare 14 , 15 , 16 . This is often formalized as maximizing a net present value,
where B ( t ) is the benefit minus the cost (in units of consumption) due to both the management and the environment at time t , and Δ( t ) is the cumulative discount. In turn, the discount factor, exp(−Δ( t )), is the number of units of some good or currency needed at present to compensate for the lack of one unit at time t . The rationale behind discounting is that the objective of our society is to maximize welfare rather than net consumption. In turn, if society is going to be wealthier in the future, then one unit of consumed goods in the future may add less to welfare than the same unit today 14 , 15 , 16 .
Accurate discounting is particularly important for environmental policies in which the resultant damages are long-term, such as policies concerning climate change and provision of natural resources 6 , 17 , 18 . Specifically, a small difference in the discount may lead to a large difference in estimates of long-term environmental cost. For example, consider no changes in prices and a constant annual discount rate, δ ≡ dΔ/d t . Then, if the cost due to losing some good today is $1M, then the cost due to losing the exact same good (no depreciation) 100 years from now is ~$50K if δ = 3%, and only ~$2.5K if δ = 6%. Therefore, even the best estimates of environmental damages may lead to an inadequate policy if we are unable to accurately convert future costs to their present-equivalent dollar value.
The central role that discounting plays in the valuation of natural resources has led to extensive debates over the value that policymakers should use for the discount rate and over how this value varies over time. Specifically, the small values given to future environmental goods due to discounting may contradict our intuition that our society should sustain our planet’s ecosystems for future generations. One major debate followed the publication of the Stern report 6 , which used a discount rate that is smaller than those used in previous major assessments, and consequently, argued for radical emission cuts. The bulk of the criticism 19 has focused on which discount rate should policymakers use (not on the comprehensive cost assessments). Also, several authors 16 , 20 , 21 , 22 , 23 proposed that policymakers should use a discount rate that declines over time, and they showed that this is justified if future economic growth is uncertain. Another mechanism that could affect the discount rate is a large perturbation that significantly affects social welfare 24 , 25 , such as an environmental degradation that may occur due to climate change or over-harvesting 26 , 27 , 28 , 29 . Particularly, several authors showed that global changes in the provision of non-substitutable natural resources might affect their relative prices 30 , 31 and the discount rate 25 , 32 . Nevertheless, these authors considered the changes in the provision of natural resources as given, while the long-term consequences of harvesting on economic growth and discount rate remain largely unknown.
In this paper, we examine how the discount rate and factor are affected by large changes in the harvest methods used at the global scale, such as the transition from over-harvesting to harvesting sustainably. Specifically, the decline in the provision of natural resources due to the future transition might be so large that it will significantly affect social welfare and economic growth. In turn, since discount rates depend on welfare and growth, this means that the discount rate itself could be affected. Revealing harvest-induced changes in the discount will provide policymakers with better evaluations of long-term benefits and costs, thereby enabling them to improve long-term environmental policies. We focus on the harvest of renewable resources in a broad sense, where non-sustainable harvest suppresses the future provision of the resource or the ecosystem service. Examples include the over-harvesting of fish and timber that degrades fisheries and forests 10 , and non-sustainable agriculture and land-use that make future land-use less effective 33 , 34 . We show that over-harvesting temporarily keeps the discount rate higher, but is followed by a period of lower discount rates during the same period in which society makes the transition to sustainable harvesting. Specifically, during the transition, the rates of economic growth and discount could be much lower than their rates before and after the transition. Therefore, the more our society over-harvests natural resources today, the more policymakers should discount the near future, but the less they should discount the far future. Furthermore, we prove a theorem implying that postponing or slowing the transition to sustainable harvesting cannot prevent the ultimate declines in the cumulative discount. Accordingly, we develop a discount formula that incorporates the changes in the harvest methods, which, in turn, dictates significantly higher net costs due to long-lasting environmental damages.
Theoretical framework
We consider a social welfare function, U T , that depends on the provision of some natural resource at the global scale, f ( t ), and on the consumption of the other goods, including manufactured goods, c ( t ) (Methods, Eq. 4 ). In turn, the dynamics of the c ( t ) and f ( t ), together with U T , determine the social rate of discount, δ ( t ), which specifies the rate at which goods should be discounted by a social planner whose objective is to maximize social welfare 15 , 16 , 35 . To define the social rate of discount (hereafter, the discount rate), we adopt a well-established framework 12 , 14 , 16 , 32 , 36 , 37 and we assume that it is given by the rate of decline in the marginal contribution of consumption to social welfare (consumption rate of discount). Specifically, we consider a given currency unit, a dollar, that enables the consumption of exactly με units of the natural resource and (1 − μ ) ε units of the other goods, where 0 ≤ μ ≤ 1 and ε is very small. Accordingly, the discount factor at time t is given by the number of dollars needed at present to compensate for a lack of one dollar at time t . Note that the choice of μ does not affect the value given to future goods, and therefore, it does not affect the policy and/or the management decisions; rather, μ determines the units and it affects only the relative role of the discount factor and the prices in determining the value of future goods 36 , 37 . In turn, we show that this implies that the discount rate, δ ( t ), and the cumulative discount \({\mathrm{\Delta }}(t) = {\int}_0^t \delta \left( {t\prime } \right){\mathrm{d}}t\prime\) , are given by Eq. 5 , and the prices of the natural resource and of the other goods are given by Eq. A10 (Methods and Supplementary Note 1). Specifically, the discount rate and the prices depend on the substitutability of the natural resource and the other goods, which is incorporated in the social welfare function. In Supplementary Note 2, we derive specific expressions for the discount rate and for the prices in two cases, one in which the natural resource and the other goods are non-substitutable (Eqs. B5 , B9 ), and one in which they are partially substitutable (Eqs. B12 , B15 , B16 ).
In turn, the novel part of this study comes from endogenizing the dynamics of c ( t ) and f ( t ) by modeling how they depend on the harvest methods used globally (see Methods). This allows us to examine how the discount factor and the prices depend on changes in harvest methods. We assume that, if the harvest methods do not change, then c ( t ) and f ( t ) increase exponentially at fixed rates, g c and g f , respectively, due to exogenous factors such as technological developments and exogenous environmental changes; however, changes in the patterns of harvest may affect c ( t ) and f ( t ), thereby affecting the discount rate over time (see Methods). This approach builds on and generalizes previous studies that considered f ( t ) and c ( t ) that grows exponentially irrespective of the harvest 32 , 37 . Specifically, note that c ( t ) and f ( t ) characterize the total provision of the goods at the global scale, and accordingly, we consider a large ecosystem that comprises a large number of distinct regions (Fig. 1 ). This ecosystem may be, for example, the entire planet’s aquatic ecosystem, where each region is some local fishery providing fish; the forest area on a given continent, where each region is a single forest providing timber; or the area that can be used for agriculture worldwide, where each region is a local geographic area comprised of agricultural fields. We are interested in the long-lasting effects of harvesting on the provision of the natural resource, and therefore, we focus on irreversible degradations of the ecosystem, rather than on temporary fluctuations of the resource stock. These degradations may occur, for example, if some ecosystem services are permanently lost 5 or if the ecosystem that provides the renewable resource collapses or undergoes an irreversible regime shift in some of its regions, such as occurs in eutrophication and deforestation 3 , 4 , 10 . We assume that higher rates of non-sustainable harvest (higher H n ) result in a greater provision of the natural resource at the time of harvest but also result in a higher degradation of the ecosystem (Eq. 6 , see Methods). Specifically, we assume that a given portion of the global ecosystem, H ( t ), is being harvested in year t , while some portion of the ecosystem, H n ( t ), becomes degraded during that year due to non-sustainable harvest, and cannot be used for harvest thereafter (Fig. 1 ). For example, H n ( t ) may characterize the portion of the global fish or timber stock that is lost due to the collapse of fisheries or the irreversible degradation of forests worldwide in year t 38 . For another example, H n ( t ) may characterize the persistent reduction in the yield of crop caused by the degradation of vital ecosystem services and the increase in the persistence of pests 33 , 34 . In turn, H ( t ) and H n ( t ) are determined by the various harvest methods used in the system (see Methods).
Schematic illustration of the model. Demonstrated is the state of the system at the global scale (e.g., the entire planet’s marine area, forest area, or agricultural area) in a given year. The dark-gray area characterizes the part of the system that is degraded due to former non-sustainable harvesting. The light gray area with the arrows characterizes the part of the system that is being harvested non-sustainably and will be degraded starting next year (total dark-gray area is given by H n ). The green area with the fishing vessels characterizes the part of the system that is being harvested sustainably and will remain non-degraded next year (total green area is given by H s ). (Note that the total area under harvest, H , is given by the green and the light gray areas combined, H = H n + H s ). The blue area characterizes the part of the system that is not degraded but is still not being harvested. We assume that the spatial scale of the system is very large, and therefore, the recovery of the degraded areas due to migrating biota from other regions is negligible and the total degraded area increases over time. Each year, H n and H s are determined by the aggregate management by all the managers. We assume that managers may be subject to different externalities in distinct regions, e.g., some regions are managed by a single manager that dictates the harvest method, while some regions are shared (open-access), and all managers are free to harvest in them (rightmost region). The variables x 1 and x 2 (Eqs. 7 and 8 ) characterize the total non-degraded areas (blue, green, and light gray) in the managed and in the shared regions, respectively
To examine the effect of over-harvesting on the natural resource and on the discount rate, we compare scenarios in which over-harvesting occurs to scenarios in which it does not. We consider two approaches. First, we consider a competitive market approach in which we compare the optimal solution that maximizes social welfare with the solution that emerges in a model of a perfectly competitive market with externalities (Figs. 2 and 3 ). Specifically, the competitive market includes managed regions that have a single manager (e.g., landowner, government), and shared regions in which multiple managers are free to harvest (e.g., open-access) (see Methods). Second, we consider a more general approach in which we compare the dynamics that emerge when the harvest is entirely sustainable with the dynamics that emerge following various ad hoc choices of non-sustainable harvest functions (Theorem and Fig. 4 ).
Over-harvesting extends the period during which the discount rate is high, but it is followed by sharp declines in the discount rate and the cumulative discount. Panels a and b demonstrate the optimal harvest of the natural resource from a social planner’s perspective, where the natural resource and the other goods are either non-substitutable ( a , Eq. B2 ) or partially substitutable ( b , Eq. B10 ). In the early stages, harvesting activity increases exponentially and the discount rate is high. Approximately at time t 0 , when harvesting is occurring in the whole system ( H s + H n = x 1 + x 2 ), the total harvest stops increasing and the discount rate decreases. Next, panels c and d demonstrate harvesting in a competitive market in which some of the regions are shared. The parameters and utility functions used in panels c and d are identical to those used in panels a and b , respectively. The period during which the discount rate is high is extended until t = t 1 due to over-harvesting of the natural resource in the shared regions (compare panel a with panel c , and compare panel b with panel d ). However, this period is followed by a rebound in which harvesting declines and the discount rate and the cumulative discount drop. In addition, around t = t 1 , the price of the natural resource increases and the total product decreases. Note that, in accordance with the theorem, the cumulative discount approaches lower values if the harvest is determined by the market. Scaling: the harvest rates are given in (years) −1 , the total non-degraded areas are given in units showing the maximal annual sustainable yield ( ax 1 and ax 2 ), and Δ is given by 100 times the value on the y -axis. The parameter values used are within their realistic ranges (Methods). Parameter values and Source data are provided as a Source Data file
Social welfare and the cumulative discount are ultimately lower if the transition to sustainable harvest is more gradual. Demonstrated are the aggregate non-sustainable harvest, H n ( t ) (solid lines); the aggregate sustainable harvest, H s ( t ) (dashed lines); and the cumulative discount, Δ (dotted lines), for two systems. System 1 (blue) follows the market solution, in which society abruptly stops harvesting non-sustainably at t = t 1 . System 2 (purple) follows the same dynamics until t = t 1 , but then, society gradually shifts to sustainable harvest. The gradual transition postpones the decline in the cumulative discount, but ultimately, it declines to an even lower value than its value in system 1. Moreover, the cumulative welfare, U t , in system 1 is initially smaller, but it ultimately becomes greater compared to system 2 (gray). Harvest rates are given in units of (years) −1 , and Δ is given by 100 times the value on the y -axis. The parameters are the same as in Fig. 2c (Parameter values and Source data are provided as a Source Data file)
The decline in the cumulative discount is unavoidable (demonstration of the theorem). At some point in time, − t 0 , some planetary boundaries for harvest have been approached, and the rate of discount that would have occurred if managers used only sustainable harvesting has decreased from δ today to δ sus (blue lines, Δ sus ). Nevertheless, due to over-harvesting, the economy grew faster and the cumulative discount, \({\mathrm{\Delta }}(t) = {\int}_0^t \delta (t{\prime}){\mathrm{d}}t{\prime}\) , continued to grow at a higher rate, δ today (solid orange lines), at least until today ( t = 0). In turn, the future value of Δ( t ) depends on the future harvest patterns. If over-harvesting continues, the discount rate might remain close to δ today for several years or decades (dotted orange lines). But in the longer run, according to the theorem, Δ has to decrease below the blue curve that characterizes Δ sus , regardless of how the resource is being harvested. This is also demonstrated for three scenarios in panel a : In scenario 1, the non-sustainable harvest stops today, while in scenarios 2 and 3, the non-sustainable harvest continues for a few decades and then declines gradually. Also, note that Δ sus increases at a rate δ sus , so if one assumes that the discount rate remains δ today for the next τ years and becomes δ sus afterward, then he/she needs to subtract at least ϕ τ to obtain the correct Δ (Eqs. 2 and 3 ). (The value of ϕ τ is demonstrated in Fig. 5 .) We assume that u ( c , f ) is given by Eq. B5 (non-substitutable goods) in panels a and c , and by Eq. B12 (partially substitutable goods) in panels b and d . In turn, the scenarios are calculated for three different choices of H n ( t ), where the dynamics follow Eqs. 6 – 9 with H ( t ) = x 1 ( t ) + x 2 ( t ) for all t . The parameter values used are within their realistic ranges (Methods). Parameter values and Source data are provided as a Source Data file
Over-harvesting is followed by declines in the discount rate
Following the optimal solution in which the harvest functions maximize social welfare, two phases emerge along the time axis (Fig. 2a, b ). In the first phase ( t < t 0 ), c ( t ) is initially small, and the harvest rates are limited due to the direct cost of harvesting (Methods, Eq. 9 ). Over time, as c ( t ) increases, the direct cost plays a less significant role, and the harvest rates increase. Consequently, f ( t ) increases at a rate that is greater than g f , and the discount rate approximately follows Ramsey’s formula. In the second phase ( t > t 0 ), the entire ecosystem is under harvest (either sustainable or non-sustainable). Therefore, the society cannot increase f via harvesting without increasing the non-sustainable harvest (i.e., increasing H n ), which would negatively affect the resource’s future provision. Consequently, the non-sustainable harvest decreases exponentially and c ( t ) and f ( t ) increase at approximately the rates of their technological developments, namely, \(\dot c/c \approx g_{\mathrm{c}}\) and \(\dot f/f \approx g_{\mathrm{f}}\) . This implies that, if g f < g c , the discount rate in the second phase is lower than it was in the first phase (Eqs. B6 , B13 , Supplementary Note 2 ). Note that the optimal solution comprises non-sustainable harvest ( H n > 0) because an increase in f at a given time has a greater effect on welfare than the same increase at a later time; the lower the discount rate, the lower the rate of non-sustainable harvest.
In turn, in the competitive market solution (see Methods), the rate of non-sustainable harvest is higher than the socially optimal rate, namely, the solution exhibits over-harvesting (Fig. 2c, d ). Specifically, the harvest is still primarily sustainable in the managed regions but is non-sustainable in the shared regions. The total area under (non-sustainable) harvest in the shared regions increases over time, and consequently, f ( t ) continues to increase over an extended period of time, which postpones the decline in the discount rate. Eventually, however, at time t = t 1 (Fig. 2 ), the shared regions become entirely degraded and the total rate of non-sustainable harvest declines. In turn, the period during which managers over-harvest ( t < t 1 ) is followed by declines in the discount rate, the cumulative discount (Δ), total production (Eq. A11 ), and the price of manufactured goods (Eq. A10 ). These declines are greater if the magnitude and/or duration of the over-harvesting are greater (e.g., if more regions are shared), and also if the natural and the manufactured goods are non-substitutable. Note that the optimal solution exhibits no declines in economic growth or in Δ because the social planner plans for the forthcoming constraints on the harvest by avoiding over-harvesting in the early stages ( t < t 0 ); in the market solution, managers also take into account the forthcoming decline in f and avoid non-sustainable harvesting in the managed regions prior to time t = t 1 , but they still over-harvest in the shared regions. Also note that, in both the optimal and the market solutions, the harvest functions, as well as c ( t ) and f ( t ), do not depend on μ (only the discount and the prices do).
Decline in the cumulative discount is unavoidable (theorem)
More generally, the following theorem shows that over-harvesting may result in an increase in Δ in the short run, but ultimately, Δ would return to a lower value than it would have had if managers used optimal harvesting or only sustainable harvesting (see proof in Supplementary Note 3 and demonstration in Figs. 3 and 4 ). Specifically, a more gradual transition to using sustainable harvest methods may result in a more gradual decline in Δ, but the ultimate magnitude of the decline must exceed that of the incline in Δ that occurred formerly due to the over-harvesting (Figs. 3 and 4a ). In particular, the theorem shows that the result is robust and does not depend on specific assumptions and parameters. It applies not only in the competitive market model but also in the more general case in which non-sustainable harvest is used instead of more sustainable harvest.
Theorem . Assume that the social welfare, U T , is given by Eq. 4 , where f(t) is given by Eq. 6 , and c(t) is given by Eq. 9 with C 1 = C 2 = constant (Methods). Also, assume that u(c,f) is monotonically increasing and twice differentiable with respect to both of c and f, and all of its second partial derivatives are non-positive (namely, an increase in c or f does not cause another increase to be more beneficial). In addition, we consider g f = 0 and assume that as c \(\rightarrow\) ∞ while f remains fixed, u c /u f \(\rightarrow\) 0 (the price of c approaches 0), u cc /u ff \(\rightarrow\) 0 and u cf /u ff \(\rightarrow\) 0. (Alternatively, we consider g f > 0 and assume that u satisfies the conditions of Lemmas 2B and 3). Finally, we assume that, for sufficiently large t, cu fc /u f and fu ff /u f are monotone with respect to t. (All these assumptions are satisfied if u is given by Eqs. B2 , B10 with η > 1, or various other standard forms 32 , 37 .)
Denote Δ opt as the cumulative discount (Eq. 5 ) that emerges following the optimal harvest. Namely, the non-negative harvest functions maximize social welfare (max U T subject to Eqs. 6 – 9 where T \(\rightarrow\) ∞; see Methods). Next, denote Δ market as the cumulative discount that emerges where the harvest functions are determined if each manager aims to maximize her/his own profit and the non-sustainable harvest may be higher than its socially optimal level (Methods). Then, there exists a time t c such that Δ market ≤ Δ opt for all t ≥ t c . Furthermore, denote Δ sus as the cumulative discount that emerges following optimal harvest while excluding non-sustainable harvest (H n = 0). Then, for any Δ that emerges if non-sustainable harvest occurs (H n (t) > 0) between times t 0 and t 1 , there exists t c > t 1 such that Δ(t c ) ≤ Δ sus (t c ) .
A new discount formula
The theorem shows that an upper bound on Δ( t ) in the long run is given by Δ sus ( t ), the cumulative discount that would have occurred if managers used only sustainable harvest, which increases at a rate given by δ sus (Fig. 4 and Supplementary Note 2). Also, the present value of Δ sus is below Δ because over-harvesting already has occurred prior to today. Specifically, ϕ 0 = Δ(0) − Δ sus (0) reflects the negative shock to Δ that must occur during the transition to sustainable harvest methods due to the prior over-harvesting. It follows that, if t is sufficiently large and δ sus is constant, then
Particularly, if the discount rate has been δ today > δ sus due to non-sustainable harvest during the last t 0 years, and if δ today and δ sus have been constants, then ϕ 0 = ( δ today − δ sus ) t 0 .
The correction to the value of future goods is significant
Next, we calculate the correction to the value of future natural goods as dictated from Eq. 2 . Specifically, we compare the value dictated by the formula to the value dictated by a benchmark policy that assumes that the rate of increase in the provision of the natural resource would remain g c for the next τ years and decrease to g f thereafter 12 . Namely, this benchmark policy ignores the negative shock and simply uses a discount rate given by δ ( t ) = δ today if t ≤ τ and δ ( t ) = δ sus if t > τ . In turn, we would like to calculate the correction to that policy due to the negative shock to Δ. Note that the inevitable decline in the future value of the cumulative discount, ϕ 0 (Eq. 2 ), is what policymakers need to incorporate due to the over-harvesting that has already occurred before t = 0. But if the discount rate remained δ today for the next τ years, until t = τ , then the lower bound on the negative shock, ϕ τ , would be greater than ϕ 0 and given by (Fig. 4 )
This greater shock would compensate for the τ years with the higher discount, such that, in the long run, Δ( t ) would still satisfy Eq. 2 . Note that the shock may be gradual and spread over many years, but this decline in Δ( t ) eventually occurs (Theorem, Figs. 3 and 4 ).
Therefore, this shock implies that the correct discount factor should be greater by a factor of at least exp( ϕ τ ) compared to the one implied by the benchmark policy. Namely, ignoring this shock and simply considering the benchmark policy would result in underestimating the value of future natural goods by a factor of at least exp( ϕ τ ) (Fig. 5 ). In turn, the magnitude of ϕ τ depends on the substitutability of the natural resource and the other goods, as well as on the exogenous growth rates, g c and g f (Supplementary Note 2). For example, if the natural resource is non-substitutable (Eq. B2 ), then δ sus is given by Eq. B5 and ( δ today − δ sus ) \(\rightarrow\) η ( g c − g f ) as t \(\rightarrow\) ∞ (Eq. B7 ). Expressions that result from other utility functions are given in Supplementary Note 2 and in the literature 32 , 37 . These expressions enable us to quantify exp( ϕ τ ) and examine how it depends on the parameters (Fig. 5 ). For example, if g f = 1% year −1 , g c = 2% year −1 36 and τ = 50 years, then the value of future goods before the adjustment is underestimated by a factor greater than two (exp( ϕ τ ) > 2), and this factor is greater if g f is smaller or if τ is larger.
Endogenizing changes in harvest patterns implies a larger discount factor and higher values for future environmental goods. If a policymaker considers a gradual transition to sustainable harvest that would occur within τ years, then he/she may consider a sustainable discount rate, δ sus , starting from year τ . In addition, however, he/she needs to add to Δ another factor, ϕ τ , that accounts for the decline in the cumulative discount that will follow due to over-harvesting prior to time τ (Eqs. 2 , 3 and Fig. 4 ). This factor may impose significantly higher values on future goods, e.g., over two times higher if τ = 50 years and g f = 1% year −1 (exp( ϕ τ ) > 2 in both panels a and b ) and even significantly higher for higher values of τ or lower values of g f . However, if the long-term provision of the natural resource continues to increase at the same rate as the other goods, i.e., g f = g c = 2% year −1 , then δ sus = δ today and ϕ τ = 0 (Eq. 3 ). The other parameter values are the same as in Fig. 4 (Parameter values and Source data are provided as a Source Data file)
After over-harvesting for decades, many societies around the world are beginning to transition to sustainable environmental management practices and sustainable harvest methods 11 . Our study shows that the transition to sustainable harvest methods after a period of over-harvesting is expected to result in a decline in social welfare, economic growth, and the discount rate. In particular, we show that the discount rate, or the social rate of discount, does not decline gradually to its sustainable asymptotic rate; rather, the transition to sustainable harvest may include a period during which the discount rate is far below its asymptotic level (Figs. 2 – 4 and Theorem). Note that several studies suggested that policymakers need to consider discount rates that decline gradually over time due to various mechanisms, including uncertainty in technological growth 16 , 20 , 21 , 22 , 23 , slowdown in technological development due to environmental degradation 27 , 28 , and declining production due to decline in the exploitation of natural resources 12 . In contrast, we showed here that the transition to sustainable harvest imposes a sharper, non-gradual decline in the cumulative discount (Figs. 2 – 4 ). The mechanism underlying this sharper decline is that the rate of increase in the provision of natural resources not only slows down, but must at some point become lower than it would be if over-harvesting had never occurred. In turn, social welfare depends on the provision of natural resources, and therefore, a decline in their provision implies a lower discount rate.
Our results also suggest that the calculations of the discount factor in the long run should not rely on simple extrapolations of the discount rates in the short run. Specifically, over-harvesting might continue for a couple of decades, which may keep the provision of natural resources high in the short run, but will ultimately result in an even lower provision of these resources. Therefore, continued over-harvesting may justify considering higher discount rates in the short run, but it also necessitates discounting the long run less (Fig. 4a ). Ignoring the harvest-induced decline in the discount rate not only falsifies cost-benefit analyses, it also creates a bias: Over-harvesting increases the discount rate in the short run, which might unjustifiably bias the expectations of policymakers to anticipate higher future discount rates, which, in turn, is used to justify further exploitation. (This may also explain why policymakers should consider lower discount rates in the long run although there is no clear evidence that the rate of return on capital will decline during the next 30–40 years 15 .)
To correct for this bias and account for the future decline in the cumulative discount, we developed a new discount formula (Eqs. 2 and 3 ), which provides a simple way to estimate the increase in the present value of future goods due to the transition to sustainable harvest methods. Specifically, policymakers need to consider a cumulative discount, Δ( t ) (Eq. 1 ), that is lower in the long run due to its decline during the transition to sustainable harvest. Although further over-harvesting may postpone the timing of the decline, we prove in the theorem that the decline eventually comes with a rebound as Δ( t ) decreases even further: The more our society over-harvests, the lower Δ( t ) ultimately becomes. Therefore, the expected decline in the cumulative discount must be at least as large as its former increase due to over-harvesting (Eq. 2 , Fig. 4 ). In turn, this former increase is given by Eq. 3 . The correction to discounting suggested by our formula is significant (Fig. 5 ), where adjustments of the order of magnitude implied by the formula suggest significant changes in climate policy, including significant emission cuts 6 , 36 .
Note that the effect of harvest on discounting should be considered in addition to (not instead of) changes dictated by various other mechanisms and considerations. In particular, there is a controversy over the value of the rate of pure time preference, ρ , that should be used in environmental policies; some authors argue that policymakers should determine ρ based on individual’s preferences ( ρ ≈ 3% year −1 ), but others argue that policymakers should use ρ ≈ 0 based on considerations of intergenerational equity 6 , 16 , 19 , 39 . The value of ϕ τ , however, does not depend on the value of ρ and should be subtracted from Δ regardless of that choice. Similarly, uncertainty about technological development may imply that policymakers need to consider δ sus that declines over time 16 , 20 , 21 , 22 , 23 , which implies another decline in the cumulative discount on top of the one suggested here. Also, note that the future values of natural resources do not depend on the proportion given to their consumption in the currency unit, μ . Specifically, their future values do not depend on whether they are accounted for as market or as non-market goods. Nevertheless, μ does affect the relative weights given to the discount factor and to the prices of natural resources in determining the resources’ future values 32 , 36 , 37 . Specifically, ignoring the role of non-market natural resources in economic growth (considering a small μ ) would imply that a change in the provision of these resources has a larger effect on their prices but a smaller effect on the discount factor (Supplementary Note 1). Therefore, focusing on the inevitable increase in the price of natural resources following their over-harvesting would result in the same conclusions and present an alternative approach to the one presented here. In particular, the adjustment exp( ϕ τ ) (Fig. 5 ) is due to the change in the discount factor, while the complementary change in the price (Fig. 2 ) introduces another adjustment to the future value of natural resources 36 . The total adjustment due to changes in both discount and prices does not depend on the choice of μ , and would be ≥exp( ϕ τ ). The significant effect that the global transition to sustainable harvest has on the future value of natural resources suggests that climate policies should be determined jointly with other environmental policies.
Model overview
We begin with describing a well-established framework 32 , 36 , 37 that specifies how social welfare and the discount rate depend on the provision of the natural resource over time, f ( t ), and on the consumption of other goods over time, c ( t ). Next, we specify how harvest at the global scale affects the dynamics of f ( t ) and c ( t ) (which would grow exponentially if the harvest functions are fixed). We complete the model by describing how the harvest strategies are determined by the various managers in a competitive market.
Model of social welfare and the discount rate
We consider a social welfare function that is given by the widely-used form 12 , 32 , 36 , 37
where u ( c , f ) is the instantaneous utility that increases as c and f increase (Table 1 ), ρ is a constant rate of pure time preference, and T is a time horizon (we are interested in the limit T \(\rightarrow\) ∞). The distinction between the provision or consumption of the natural resource, f ( t ), and that of the other goods, c ( t ) is necessary here because, if the natural resource and the other goods are not entirely substitutable and the ratio between them varies over time, then social welfare depends on the ratio between c and f over time and cannot be written as a function of a single variable 29 . In turn, the substitutability is determined by the form of u 12 , 29 , 37 . For example, the goods may be non-substitutable, characterized by separable utility functions (Supplementary Note 2, Eq. B2 ), if one good cannot compensate for the lack of the other good (e.g., many cars cannot compensate for a lack of food). Alternatively, the goods may be partially substitutable (Eq. B10 ) if a sufficient amount of one good may compensate for the lack of the other good (e.g., many carrots can compensate for the lack of fish).
In turn, note that there are several candidates for quantifying the social rate of discount 15 , including the consumption rate of discount and the social and private rates of return to investment. These three quantities are closely-related, and, in a perfectly competitive market, they become equal and reflect the marginal productivity of capital. In this study, as in numerous related studies 12 , 14 , 16 , 32 , 36 , 37 , the focus is on the consumption rate of discount, which is the rate of decline in the marginal contribution of consumption to social welfare. In other words, the corresponding discount factor specifies how many units of consumption added at present would have the same effect on social welfare as a single unit added at time t . In turn when the welfare depends on multiple goods, the discount may depend on the particular good that the policymaker considers 31 , 36 , 37 . (This simply reflects the relative price changes of the goods.) Therefore, to define discount in our system, we consider a small, marginal perturbation to both c and f . Specifically, we consider a given currency unit, a dollar, that allows the consumption of exactly με units of the natural resource and (1 − μ ) ε units of the other goods, where 0 ≤ μ ≤ 1 and ε ≪ c (0), f (0). Accordingly, we define the discount factor at time t as the number of dollars needed at present to compensate for a lack of one dollar at time t . This implies that the discount rate, δ ( t ), is given by (Supplementary Note 1)
where subscripts in this equation denote partial derivatives and the discount factor is given by exp(−Δ). The right side of Eq. 5 , without the term ρ , is due to the change in the marginal contribution of c and f to social welfare. (Note that, if μ = 0 and d c / d t = cg c , then Eq. 5 becomes the Ramsey’s discount formula 14 , 16 , δ ( t ) = ηg c + ρ , where η ≡ cu c / u cc .) In turn, if μ reflects the portion in society’s basket of goods allocated to consumption of the natural resource, then our definition is consistent with the way the marginal productivity of capital is measured, and the total product (e.g., GDP) is proportional to the total value of all the goods (Supplementary Note 1 , Eq. A11 ). Alternatively, if we are interested in discounting some climate damage, then we can chose μ to be proportional to the cost that is due to the damage to the natural resource. Note, however, that the choice of μ only determines the units and does not affect the value given to future goods. Specifically, if the proportion of damages to the natural resource differs from μ , then one should consider the changes in relative prices in addition to discounting 36 , 37 . For example, several authors 37 considered a dual discounting framework in which the natural resource is discounted with μ = 0 and the manufactured goods with μ = 1, where the change in the relative price accounts for the difference; this approach is equivalent to the one presented here.
Model of the dynamics and management of the natural resource
Next, we specify how the harvest methods of the renewable natural resource at the global scale determine the dynamics of c ( t ) and f ( t ) (Fig. 1). Note that the aggregate harvest functions at the global scale are determined by the various harvest methods used at the local scale. In turn, at the local scale, a non-sustainable harvest in a given area during a given year yields β units of the natural resource per unit area, but the ecosystem in that area becomes degraded and ceases to yield resources thereafter. In turn, sustainable harvest in a given area yields less resource ( αβ units, where 0 < α < 1 is a constant), but the area remains fully functional for future use. For example, non-sustainable harvest may include aggressive fishing methods that inflict irreversible damage on fish populations and their habitats, while sustainable harvest implies sustaining fish populations and harvest at the fish growth rate, while also using methods that preserve the habitat and the age and size structures of the fish 38 . In turn, the productivity of the natural resource per unit area, β , may increase due to technological developments but may also decrease due to other environmental changes, such as climate change. Accordingly, we assume that β ( t ) = β 0 exp( g f t ), where β 0 = β (0) and g f is the rate of change in productivity. It follows that the total amount of the natural resource harvested globally at time t is given by
where H n is the area that is non-sustainably harvested in year t (becomes degraded and cannot be harvested thereafter), and H s ( t ) is the area that is being sustainably harvested and remain non-degraded in year t ( H s ( t ) = H ( t ) − H n ( t )).
In turn, we distinguish two types of regions: those that have a single manager, and those that are shared such that all managers are free to harvest. Ultimately, the harvest methods used by all managers determine the total areas that become degraded at time t in the managed and in the shared regions at the global scale, \(H_{\mathrm{n}}^1(t)\) and \(H_{\mathrm{n}}^2(t)\) , respectively \(\left( {H_{\mathrm{n}} = H_{\mathrm{n}}^1 + H_{\mathrm{n}}^2} \right)\) . Accordingly, the total non-degraded areas in all managed regions, x 1 , and in all shared regions, x 2 , decrease due to non-sustainable harvest as follows:
Moreover, the harvest functions are constrained by the non-degraded areas:
for all t , where \(H_{\mathrm{s}} = H_{\mathrm{s}}^1 + H_{\mathrm{s}}^2\) .
In turn, we assume that harvest comes with a direct cost as more labor and resources are directed toward harvesting. We incorporate this direct cost as a reduction in c ( t ), which would otherwise grow exponentially at an exogenous rate g c due to technological developments. Specifically, we assume that c ( t ) is given by
where C 1 and C 2 are the direct costs of harvesting (in units of c ), and λ is the ratio between the direct costs of non-sustainable and sustainable harvest.
Model of the competitive market
It remains to specify how the harvest strategies of the managers at the local scale are determined, and how these strategies determine the harvest functions at the global scale, \(H_{\mathrm{s}}^1(t),\hskip 4ptH_{\mathrm{s}}^2(t),\hskip 4ptH_{\mathrm{n}}^1\) , and \(H_{\mathrm{n}}^2(t)\) . We are interested in comparing two types of solutions: The optimal solution that maximizes the social welfare, and the market solution that emerges in a competitive market. The optimal solution is found via the maximization of the social welfare (Eq. 4 ) subject to the constraints given in Eqs. 6 – 9 . In turn, to define the market solution, we consider a competitive market in which each manager aims to maximize her/his own utility. Specifically, we consider a well-established framework in which the market is perfectly competitive, such that, if property rights are defined everywhere and there are no externalities, the market solution coincides with the optimal solution 12 , 14 , 31 , 40 , 41 , 42 . In turn, the market solution depends on the form of the externalities for the various managers, namely, it depends on how non-sustainable harvest by a given manager affects the ecosystem in regions managed by other managers.
To define the externalities, we distinguish between managed regions and shared regions (Fig. 1 ). Each managed region is managed by a single manager who determines the harvest method, which may vary anywhere between using only sustainable methods and using only non-sustainable methods. In turn, the harvest method in a given region determines the portion of the region that is harvested and the rate at which the region becomes degraded (Fig. 1 ). We assume that the management in a given managed region has no externalities as it affects only the degradation level in that region. In turn, the shared regions are managed by a very large number of managers, each of whom is free to harvest without restrictions there. Specifically, we assume that each manager ignores the effect of her/his actions on the future provision of the resource in the shared regions and considers only her/his instantaneous benefit and cost from the harvest. Consequently, the managers have the incentive to increase non-sustainable harvest in the shared regions until the price of the natural resource equals the direct cost of the harvest. These considerations enable us to find the market solution that is given by the unique Nash equilibrium (see the section Numerical methods). In particular, the perfectly competitive market assumption implies that the management in the managed regions is socially optimal under the constraint given by the management in the shared regions. Note that, without shared regions ( x 2 = 0), there are no externalities and the market solution coincides with the optimal solution.
Numerical methods
The numerical results showing the optimal and market solutions are demonstrated in Figs. 2 and 3 , system 1. The optimal solution is given by the unique set of non-negative aggregate harvest functions, \(H_{\mathrm{s}}^1(t),\hskip 4ptH_{\mathrm{s}}^2(t),\hskip 4ptH_{\mathrm{n}}^1\) , and \(H_{\mathrm{n}}^2(t)\) , that maximize social welfare: max U T (Eq. 4 ) in the limit T \(\rightarrow\) ∞, where c ( t ) and f ( t ) are given by Eqs. 6 and 9 , subject to the constraint given in Eqs. 7 and 8 . (Note that using the social welfare function given in Eq. 4 with a constant ρ , and considering deterministic dynamics of c and f , guarantee that the optimization problem is time consistent and has a unique solution 12 , 37 .) In turn, the market solution is determined by a perfectly competitive market where each manager maximizes her/his own profit. Specifically, consider the set of non-negative harvest functions that maximize utility, max U T (Eq. 4 ) as T \(\rightarrow\) ∞, subject to the constraint given by Eqs. 7a and 8 and the constraint d x 2 /d t = X ( t ). Then, the market harvest is given by the unique solution that satisfies \(X(t) = H_{\mathrm{n}}^2(t)\) (consisteny criterion).
We used algorithms that find the exact solutions provided that the resolutions are sufficiently fine. Specifically, to find the optimal solution numerically, our algorithm uses Stochastic Programming with backward induction (Supplementary Note 4) 43 , 44 . (Note that the model’s dynamics are deterministic but the general method is still called stochastic.) To find the market solution, our algorithm also uses Stochastic Programming to solve for a given value of X . But it finds a solution multiple times, each time for a different value of X , until it finds the solution that satisfies the consisteny criterion. These algorithms are coded in C/C++ and are described in detail in Supplementary Note 4.
In turn, in the results shown in Fig. 3 , system 2, as well as in Figs. 4 and 5 and in the graphical tool, we assume that the dynamics of c and f follow Eqs. 6 – 9 , but we consider harvest functions that are not given by either the optimal solution or the market solution. In Fig. 3 , system 2, we consider harvest functions that follow the market solution until t = t 1 and after t = t 1 + 10, but between these times, the non-sustainable harvest decreases gradually from its maximal level to zero. In Fig. 4 , we calculate Δ sus , which is the cumulative discount that emerges if the harvest is entirely sustainable, namely, H n = 0 and H s = x 1 + x 2 if t > 0. Also, in Fig. 4a , we consider three scenarios in which the non-sustainable harvest is higher in the beginning but eventually approaches zero, while H n + H s = x 1 + x 2 .
After we determine the harvest functions, the functions c ( t ) and f ( t ) are calculated according to Eqs. 6 and 9 . In turn, we calculate the discount rate and the cumulative discount according to Eq. 5 (where the cumulative discount is the integral over time of the discount rate). Specifically, for the case in which only sustainable harvest is used (Δ sus in Fig. 4 ), the discount rates are calculated in Supplementary Note 2 and are given by Eqs. B5 and B12 . The prices are given by Eq. A10 , and the total product is given by Eq. A11 . All of these equations are derived in Supplementary Notes 1 , 2 .
Choice of parameters
The parameter values used for all of the numerical simulations, which are given in the Source Data file, are within their realistic ranges. The rate of technological growth is around 1.5–2.0% year −1 in developed countries and is higher in some developing countries 16 , 45 . In turn, the rate of growth in the yield per unit of sustainable harvest, g f , depends on the specific natural resource, where values that were considered in the literature vary from g c down to much lower (even negative) values 32 , 37 . Next, the value of 0 ≤ a ≤ 1 (unitless) also depends on the particular system. In a fishery, for example, if non-sustainable harvest would imply catching all the fish and sustainable harvest would imply keeping the fish population size fixed, then a would be the growth rate of the fish (i.e., 2% year −1 for large fish and higher rates for smaller fish) 38 ; In agriculture, sustainable management implies the use of environmentally friendly pest control methods and effective water management, which may result in a comparable crop yield ( α ≲ 1), but may be more expensive ( λ > 1) 33 , 34 . In turn, the ratio between c ( t ) and the direct costs, C 1 and C 2 (Eq. 9 ), determines the relative portion of c that is needed per unit of harvest. Specifically, c (and thus the ratio) is initially small but increases due to technological changes. Also, C 1 and C 2 may vary with x 1 and x 2 if the cost varies among regions (e.g., if near-shore regions are depleted, the average direct cost of harvest may increase). Next, note that 0 ≤ μ ≤ 1 (unitless) can be chosen arbitrarily by the policymaker, as it does not affect the harvest strategy and the future value of the natural resource; rather, it determines the currency unit, which, in turn, determines the relative role of the discount and the price in determining the future value of the natural resource. A reasonable choice would be the portion in the basket of goods of the natural resource (e.g., the portion of agricultural products in consumption is ~5% in the United States and is higher in various developing countries), but μ may be higher if non-market goods are incorporated. Finally, a variety of utility functions that incorporate both c and f were suggested in the literature 12 , 32 , 37 , including the two that are used here (Eqs. B2 , B10 ) 12 , where estimates of η vary between 1 and 3 (unitless) 16 , 41 , 45 , and suggested values for ρ varies between 0 and 3% (year −1 ) 6 , 16 , 19 , 45 .
Analytical and theoretical analysis
The general discount formula (Eq. 5 ) is derived in Supplementary Note 1. The discount formulas for the special cases presented in the figures are derived in Supplementary Note 2. The proof of the theorem is given in Supplementary Note 3.
Data availability
No datasets were generated or analyzed during the current study. All the data needed to reproduce the results is given in the paper. In particular, the parameter values used for each figure are given in the Source Data file. These parameter values are taken from the references that are cited in the Methods section.
Code availability
The algorithm that we used for finding the optimal and market solutions (Figs. 2 and 3 ) is described in Supplementary Note 4. The C/C++ code used for generating Figs. 2 and 3 as well as the Matlab code used for generating Figs. 4 and 5 are available as a supplementary code.
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The author sincerely thanks Charles Perrings for his valuable comments on the paper. The author thanks SAL MCMSC, CLAS and SHESC, ASU, for funding (no. DN5-1057).
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Lampert, A. Over-exploitation of natural resources is followed by inevitable declines in economic growth and discount rate. Nat Commun 10 , 1419 (2019). https://doi.org/10.1038/s41467-019-09246-2
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Environmental Science (miscellaneous) | 2021 | Q1 |
Environmental Science (miscellaneous) | 2022 | Q1 |
Environmental Science (miscellaneous) | 2023 | Q1 |
The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.
Year | SJR |
---|---|
1999 | 0.201 |
2000 | 0.132 |
2001 | 0.215 |
2002 | 0.286 |
2003 | 0.223 |
2004 | 0.388 |
2005 | 0.291 |
2006 | 0.334 |
2007 | 0.567 |
2008 | 0.652 |
2009 | 0.619 |
2010 | 0.375 |
2011 | 0.461 |
2012 | 0.675 |
2013 | 0.427 |
2014 | 0.286 |
2015 | 0.454 |
2016 | 0.564 |
2017 | 0.800 |
2018 | 0.385 |
2019 | 0.672 |
2020 | 0.742 |
2021 | 0.883 |
2022 | 0.993 |
2023 | 1.013 |
Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.
Year | Documents |
---|---|
1999 | 22 |
2000 | 25 |
2001 | 19 |
2002 | 24 |
2003 | 25 |
2004 | 22 |
2005 | 28 |
2006 | 21 |
2007 | 26 |
2008 | 23 |
2009 | 22 |
2010 | 22 |
2011 | 29 |
2012 | 32 |
2013 | 22 |
2014 | 24 |
2015 | 24 |
2016 | 31 |
2017 | 34 |
2018 | 33 |
2019 | 100 |
2020 | 222 |
2021 | 255 |
2022 | 167 |
2023 | 147 |
This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.
Cites per document | Year | Value |
---|---|---|
Cites / Doc. (4 years) | 1999 | 0.156 |
Cites / Doc. (4 years) | 2000 | 0.071 |
Cites / Doc. (4 years) | 2001 | 0.354 |
Cites / Doc. (4 years) | 2002 | 0.505 |
Cites / Doc. (4 years) | 2003 | 0.511 |
Cites / Doc. (4 years) | 2004 | 0.645 |
Cites / Doc. (4 years) | 2005 | 0.644 |
Cites / Doc. (4 years) | 2006 | 1.030 |
Cites / Doc. (4 years) | 2007 | 1.302 |
Cites / Doc. (4 years) | 2008 | 1.814 |
Cites / Doc. (4 years) | 2009 | 2.082 |
Cites / Doc. (4 years) | 2010 | 1.391 |
Cites / Doc. (4 years) | 2011 | 1.452 |
Cites / Doc. (4 years) | 2012 | 1.260 |
Cites / Doc. (4 years) | 2013 | 1.029 |
Cites / Doc. (4 years) | 2014 | 1.086 |
Cites / Doc. (4 years) | 2015 | 1.346 |
Cites / Doc. (4 years) | 2016 | 1.363 |
Cites / Doc. (4 years) | 2017 | 2.574 |
Cites / Doc. (4 years) | 2018 | 1.858 |
Cites / Doc. (4 years) | 2019 | 3.385 |
Cites / Doc. (4 years) | 2020 | 4.399 |
Cites / Doc. (4 years) | 2021 | 5.681 |
Cites / Doc. (4 years) | 2022 | 5.772 |
Cites / Doc. (4 years) | 2023 | 5.289 |
Cites / Doc. (3 years) | 1999 | 0.156 |
Cites / Doc. (3 years) | 2000 | 0.080 |
Cites / Doc. (3 years) | 2001 | 0.451 |
Cites / Doc. (3 years) | 2002 | 0.636 |
Cites / Doc. (3 years) | 2003 | 0.397 |
Cites / Doc. (3 years) | 2004 | 0.721 |
Cites / Doc. (3 years) | 2005 | 0.634 |
Cites / Doc. (3 years) | 2006 | 0.987 |
Cites / Doc. (3 years) | 2007 | 1.211 |
Cites / Doc. (3 years) | 2008 | 1.960 |
Cites / Doc. (3 years) | 2009 | 1.071 |
Cites / Doc. (3 years) | 2010 | 1.268 |
Cites / Doc. (3 years) | 2011 | 1.433 |
Cites / Doc. (3 years) | 2012 | 1.315 |
Cites / Doc. (3 years) | 2013 | 0.964 |
Cites / Doc. (3 years) | 2014 | 0.904 |
Cites / Doc. (3 years) | 2015 | 1.256 |
Cites / Doc. (3 years) | 2016 | 1.414 |
Cites / Doc. (3 years) | 2017 | 2.696 |
Cites / Doc. (3 years) | 2018 | 1.978 |
Cites / Doc. (3 years) | 2019 | 3.796 |
Cites / Doc. (3 years) | 2020 | 4.521 |
Cites / Doc. (3 years) | 2021 | 5.854 |
Cites / Doc. (3 years) | 2022 | 5.716 |
Cites / Doc. (3 years) | 2023 | 5.472 |
Cites / Doc. (2 years) | 1999 | 0.106 |
Cites / Doc. (2 years) | 2000 | 0.070 |
Cites / Doc. (2 years) | 2001 | 0.638 |
Cites / Doc. (2 years) | 2002 | 0.568 |
Cites / Doc. (2 years) | 2003 | 0.419 |
Cites / Doc. (2 years) | 2004 | 0.755 |
Cites / Doc. (2 years) | 2005 | 0.745 |
Cites / Doc. (2 years) | 2006 | 0.780 |
Cites / Doc. (2 years) | 2007 | 1.367 |
Cites / Doc. (2 years) | 2008 | 1.043 |
Cites / Doc. (2 years) | 2009 | 0.857 |
Cites / Doc. (2 years) | 2010 | 1.200 |
Cites / Doc. (2 years) | 2011 | 1.455 |
Cites / Doc. (2 years) | 2012 | 1.196 |
Cites / Doc. (2 years) | 2013 | 0.803 |
Cites / Doc. (2 years) | 2014 | 0.537 |
Cites / Doc. (2 years) | 2015 | 1.109 |
Cites / Doc. (2 years) | 2016 | 1.500 |
Cites / Doc. (2 years) | 2017 | 3.091 |
Cites / Doc. (2 years) | 2018 | 2.323 |
Cites / Doc. (2 years) | 2019 | 3.761 |
Cites / Doc. (2 years) | 2020 | 4.789 |
Cites / Doc. (2 years) | 2021 | 5.804 |
Cites / Doc. (2 years) | 2022 | 5.883 |
Cites / Doc. (2 years) | 2023 | 5.403 |
Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years. Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.
Cites | Year | Value |
---|---|---|
Self Cites | 1999 | 10 |
Self Cites | 2000 | 1 |
Self Cites | 2001 | 15 |
Self Cites | 2002 | 16 |
Self Cites | 2003 | 10 |
Self Cites | 2004 | 16 |
Self Cites | 2005 | 11 |
Self Cites | 2006 | 2 |
Self Cites | 2007 | 9 |
Self Cites | 2008 | 18 |
Self Cites | 2009 | 4 |
Self Cites | 2010 | 13 |
Self Cites | 2011 | 12 |
Self Cites | 2012 | 9 |
Self Cites | 2013 | 5 |
Self Cites | 2014 | 7 |
Self Cites | 2015 | 6 |
Self Cites | 2016 | 8 |
Self Cites | 2017 | 50 |
Self Cites | 2018 | 27 |
Self Cites | 2019 | 77 |
Self Cites | 2020 | 157 |
Self Cites | 2021 | 307 |
Self Cites | 2022 | 312 |
Self Cites | 2023 | 307 |
Total Cites | 1999 | 14 |
Total Cites | 2000 | 7 |
Total Cites | 2001 | 37 |
Total Cites | 2002 | 42 |
Total Cites | 2003 | 27 |
Total Cites | 2004 | 49 |
Total Cites | 2005 | 45 |
Total Cites | 2006 | 74 |
Total Cites | 2007 | 86 |
Total Cites | 2008 | 147 |
Total Cites | 2009 | 75 |
Total Cites | 2010 | 90 |
Total Cites | 2011 | 96 |
Total Cites | 2012 | 96 |
Total Cites | 2013 | 80 |
Total Cites | 2014 | 75 |
Total Cites | 2015 | 98 |
Total Cites | 2016 | 99 |
Total Cites | 2017 | 213 |
Total Cites | 2018 | 176 |
Total Cites | 2019 | 372 |
Total Cites | 2020 | 755 |
Total Cites | 2021 | 2078 |
Total Cites | 2022 | 3298 |
Total Cites | 2023 | 3524 |
Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.
Cites | Year | Value |
---|---|---|
External Cites per document | 1999 | 0.044 |
External Cites per document | 2000 | 0.068 |
External Cites per document | 2001 | 0.268 |
External Cites per document | 2002 | 0.394 |
External Cites per document | 2003 | 0.250 |
External Cites per document | 2004 | 0.485 |
External Cites per document | 2005 | 0.479 |
External Cites per document | 2006 | 0.960 |
External Cites per document | 2007 | 1.085 |
External Cites per document | 2008 | 1.720 |
External Cites per document | 2009 | 1.014 |
External Cites per document | 2010 | 1.085 |
External Cites per document | 2011 | 1.254 |
External Cites per document | 2012 | 1.192 |
External Cites per document | 2013 | 0.904 |
External Cites per document | 2014 | 0.819 |
External Cites per document | 2015 | 1.179 |
External Cites per document | 2016 | 1.300 |
External Cites per document | 2017 | 2.063 |
External Cites per document | 2018 | 1.674 |
External Cites per document | 2019 | 3.010 |
External Cites per document | 2020 | 3.581 |
External Cites per document | 2021 | 4.989 |
External Cites per document | 2022 | 5.175 |
External Cites per document | 2023 | 4.995 |
Cites per document | 1999 | 0.156 |
Cites per document | 2000 | 0.080 |
Cites per document | 2001 | 0.451 |
Cites per document | 2002 | 0.636 |
Cites per document | 2003 | 0.397 |
Cites per document | 2004 | 0.721 |
Cites per document | 2005 | 0.634 |
Cites per document | 2006 | 0.987 |
Cites per document | 2007 | 1.211 |
Cites per document | 2008 | 1.960 |
Cites per document | 2009 | 1.071 |
Cites per document | 2010 | 1.268 |
Cites per document | 2011 | 1.433 |
Cites per document | 2012 | 1.315 |
Cites per document | 2013 | 0.964 |
Cites per document | 2014 | 0.904 |
Cites per document | 2015 | 1.256 |
Cites per document | 2016 | 1.414 |
Cites per document | 2017 | 2.696 |
Cites per document | 2018 | 1.978 |
Cites per document | 2019 | 3.796 |
Cites per document | 2020 | 4.521 |
Cites per document | 2021 | 5.854 |
Cites per document | 2022 | 5.716 |
Cites per document | 2023 | 5.472 |
International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.
Year | International Collaboration |
---|---|
1999 | 31.82 |
2000 | 16.00 |
2001 | 31.58 |
2002 | 16.67 |
2003 | 12.00 |
2004 | 9.09 |
2005 | 14.29 |
2006 | 14.29 |
2007 | 30.77 |
2008 | 17.39 |
2009 | 13.64 |
2010 | 13.64 |
2011 | 13.79 |
2012 | 12.50 |
2013 | 9.09 |
2014 | 8.33 |
2015 | 25.00 |
2016 | 25.81 |
2017 | 20.59 |
2018 | 24.24 |
2019 | 39.00 |
2020 | 34.68 |
2021 | 34.12 |
2022 | 29.34 |
2023 | 30.61 |
Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.
Documents | Year | Value |
---|---|---|
Non-citable documents | 1999 | 2 |
Non-citable documents | 2000 | 2 |
Non-citable documents | 2001 | 1 |
Non-citable documents | 2002 | 0 |
Non-citable documents | 2003 | 0 |
Non-citable documents | 2004 | 1 |
Non-citable documents | 2005 | 1 |
Non-citable documents | 2006 | 2 |
Non-citable documents | 2007 | 1 |
Non-citable documents | 2008 | 2 |
Non-citable documents | 2009 | 2 |
Non-citable documents | 2010 | 2 |
Non-citable documents | 2011 | 1 |
Non-citable documents | 2012 | 0 |
Non-citable documents | 2013 | 1 |
Non-citable documents | 2014 | 2 |
Non-citable documents | 2015 | 3 |
Non-citable documents | 2016 | 2 |
Non-citable documents | 2017 | 1 |
Non-citable documents | 2018 | 1 |
Non-citable documents | 2019 | 2 |
Non-citable documents | 2020 | 4 |
Non-citable documents | 2021 | 6 |
Non-citable documents | 2022 | 8 |
Non-citable documents | 2023 | 7 |
Citable documents | 1999 | 88 |
Citable documents | 2000 | 86 |
Citable documents | 2001 | 81 |
Citable documents | 2002 | 66 |
Citable documents | 2003 | 68 |
Citable documents | 2004 | 67 |
Citable documents | 2005 | 70 |
Citable documents | 2006 | 73 |
Citable documents | 2007 | 70 |
Citable documents | 2008 | 73 |
Citable documents | 2009 | 68 |
Citable documents | 2010 | 69 |
Citable documents | 2011 | 66 |
Citable documents | 2012 | 73 |
Citable documents | 2013 | 82 |
Citable documents | 2014 | 81 |
Citable documents | 2015 | 75 |
Citable documents | 2016 | 68 |
Citable documents | 2017 | 78 |
Citable documents | 2018 | 88 |
Citable documents | 2019 | 96 |
Citable documents | 2020 | 163 |
Citable documents | 2021 | 349 |
Citable documents | 2022 | 569 |
Citable documents | 2023 | 637 |
Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.
Documents | Year | Value |
---|---|---|
Uncited documents | 1999 | 82 |
Uncited documents | 2000 | 81 |
Uncited documents | 2001 | 62 |
Uncited documents | 2002 | 40 |
Uncited documents | 2003 | 47 |
Uncited documents | 2004 | 35 |
Uncited documents | 2005 | 47 |
Uncited documents | 2006 | 50 |
Uncited documents | 2007 | 48 |
Uncited documents | 2008 | 45 |
Uncited documents | 2009 | 38 |
Uncited documents | 2010 | 36 |
Uncited documents | 2011 | 27 |
Uncited documents | 2012 | 34 |
Uncited documents | 2013 | 45 |
Uncited documents | 2014 | 48 |
Uncited documents | 2015 | 40 |
Uncited documents | 2016 | 29 |
Uncited documents | 2017 | 20 |
Uncited documents | 2018 | 30 |
Uncited documents | 2019 | 23 |
Uncited documents | 2020 | 27 |
Uncited documents | 2021 | 48 |
Uncited documents | 2022 | 84 |
Uncited documents | 2023 | 76 |
Cited documents | 1999 | 8 |
Cited documents | 2000 | 7 |
Cited documents | 2001 | 20 |
Cited documents | 2002 | 26 |
Cited documents | 2003 | 21 |
Cited documents | 2004 | 33 |
Cited documents | 2005 | 24 |
Cited documents | 2006 | 25 |
Cited documents | 2007 | 23 |
Cited documents | 2008 | 30 |
Cited documents | 2009 | 32 |
Cited documents | 2010 | 35 |
Cited documents | 2011 | 40 |
Cited documents | 2012 | 39 |
Cited documents | 2013 | 38 |
Cited documents | 2014 | 35 |
Cited documents | 2015 | 38 |
Cited documents | 2016 | 41 |
Cited documents | 2017 | 59 |
Cited documents | 2018 | 59 |
Cited documents | 2019 | 75 |
Cited documents | 2020 | 140 |
Cited documents | 2021 | 307 |
Cited documents | 2022 | 493 |
Cited documents | 2023 | 568 |
Evolution of the percentage of female authors.
Year | Female Percent |
---|---|
1999 | 10.81 |
2000 | 22.73 |
2001 | 12.50 |
2002 | 5.26 |
2003 | 6.25 |
2004 | 10.00 |
2005 | 5.71 |
2006 | 16.22 |
2007 | 21.57 |
2008 | 15.15 |
2009 | 8.33 |
2010 | 14.63 |
2011 | 15.52 |
2012 | 6.56 |
2013 | 37.04 |
2014 | 23.88 |
2015 | 16.83 |
2016 | 13.79 |
2017 | 13.04 |
2018 | 22.54 |
2019 | 23.59 |
2020 | 22.82 |
2021 | 20.84 |
2022 | 25.66 |
2023 | 24.54 |
Evolution of the number of documents cited by public policy documents according to Overton database.
Documents | Year | Value |
---|---|---|
Overton | 1999 | 0 |
Overton | 2000 | 0 |
Overton | 2001 | 0 |
Overton | 2002 | 0 |
Overton | 2003 | 0 |
Overton | 2004 | 2 |
Overton | 2005 | 8 |
Overton | 2006 | 8 |
Overton | 2007 | 2 |
Overton | 2008 | 2 |
Overton | 2009 | 5 |
Overton | 2010 | 3 |
Overton | 2011 | 5 |
Overton | 2012 | 4 |
Overton | 2013 | 1 |
Overton | 2014 | 4 |
Overton | 2015 | 3 |
Overton | 2016 | 1 |
Overton | 2017 | 4 |
Overton | 2018 | 5 |
Overton | 2019 | 3 |
Overton | 2020 | 5 |
Overton | 2021 | 3 |
Overton | 2022 | 0 |
Overton | 2023 | 1 |
Evoution of the number of documents related to Sustainable Development Goals defined by United Nations. Available from 2018 onwards.
Documents | Year | Value |
---|---|---|
SDG | 2018 | 12 |
SDG | 2019 | 33 |
SDG | 2020 | 45 |
SDG | 2021 | 43 |
SDG | 2022 | 27 |
SDG | 2023 | 31 |
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- UConn Library
- Natural Resources and the Environment Subject Guide
- Research Topics
Natural Resources and the Environment Subject Guide — Research Topics
- Starting Your Research Project
- Searching Scholarly Databases
- Encyclopedias & Handbooks
- Finding Books
- Useful Tools
- Other Information Sources
Narrowing a topic
Sometimes narrowing to a specific topic does not come naturally and can be a difficult task. Here are some techniques available to make this process simpler.
- First, pick a topic in which you are interested. You will spend a lot of time with your topic and you will do a better job with it if you find the topic enjoyable. As you search through potential topics, note which pique your interest and follow them further.
- Look for a topic with some recent controversy or a set of related topics which can be compared and contrasted.
- Pick a topic which you have some hope of understanding. If you cannot understand the basics you will not be able to write about it. Not all topics are appropriate for undergraduate paper writing.
Some additional sites with help on choosing and narrowing topics are listed below.
- Choosing and Narrowing a Topic
- Narrowing a Topic
- Narrowing a Topic and Developing a Research Question
- Identifying when a Topic is Too Narrow or Too Broad
Where to find possible topics for science papers
If you don't know on what topic you want to write a paper, start by looking in sources with broad spreads of relevant information.
- Search any database by a particular journal or review journal (Science, Nature, Trends in Ecology & Evolution, etc.)
- Look for a classic topic in your textbook
- Scan popular science sciences magazines such as Bioscience, Scientific American, Discover, etc.
- Go to the popular website www.sciencedaily.com which covers most aspects of science and search for a topic
- Search for ideas in the encyclopedias, handbooks or other books listed in this guide on a separate page
- If you have some idea of a topic, search for review articles on that topic in one of the science databases listed in this guide
- Search the table of contents of a journal which specializes in review articles, such as Trends in Ecology and Evolution
Search Strategies for Topics
Part of picking a topic will involve conducting literature searches. As you search for your topic(s) start with searches as BROAD as possible, while remaining relevant to your topic. Starting broad will give a breadth of coverage that allows you easy options for narrowing your topic. If you start with a narrow topic it is much harder to broaden your topic later to explore more options.
Describe your topic in a sentence.
How did carnivorous plants evolve digestive enzymes?
What are your major concepts? Identify the main elements of your topic.
Concept 1 | Evolution |
Concept 2 | Carnivorous plants |
Concept 3 | Digestive enzymes |
Think of related terms for your concepts. Use both common words and scientific terms.
|
| Synonyms | Synonyms | Synonyms | Synonyms |
Concept 1 | Evolution | Convergent evolution |
|
|
|
Concept 2 | Carnivorous plants | Cephalotus follicularis (Australian pitcher plant) | Nepenthes alata (Asian pitcher plant) | Sarracenia purpurea (American pitcher plant) | Drosera adelae (Sundew) |
Concept 3 | Digestive enzymes | Chitanase | Purple acid phosphatase | RNase T2 |
|
Add Boolean Operators (AND & OR) to structure the search in a database search interface.
Synonyms | Synonyms | Synonyms | Synonyms | ||
Concept 1 | Evolution | Convergent evolution | |||
Concept 2 | Carnivorous plants | Cephalotus follicularis Australian pitcher plant | Nepenthes alata Asian pitcher plant | Sarracenia purpurea American pitcher plant | Drosera adelae Sundew |
Concept 3 | Digestive enzymes | Citanase | Purple acid phosphatase | RNase T2 |
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The Sustainable Use of Natural Resources: The Governance Challenge
Still Only One Earth: Lessons from 50 years of UN sustainable development policy
Over-exploitation of natural resources harms the health of ecosystems and the wellbeing of people. In the face of environmental crises and growing inequality, we need to act, including developing extended producer responsibility and supply chain legislation, guaranteeing green public procurement, supporting technical innovation to enhance resource circularity, and adopting decision-making processes that include and respect women, Indigenous Peoples, and local communities. ( Download PDF ) ( See all policy briefs ) ( Subscribe to ENB )
Natural resources are central to human wellbeing. We cannot live without the clean air we breathe, the plants we eat, or the water we drink. We need natural resources to put roofs over our heads and heat our homes. We need them to survive and to thrive.
The concept of natural resources refers to naturally occurring living and non-living elements of the Earth system, including plants, fish, and fungi, but also water, soil, and minerals. A prominent way to think about natural resources is to look at them in terms of depletion risk: do they regenerate, and, if so, at what pace? Some resources, such as trees and plants, are renewable because they regenerate relatively quickly. Others, such as copper and oil, take much longer to form and are considered non-renewable. Together, natural resources make up a dense web of interdependence, forming ecosystems that also include humans. As such, the distribution of resources shapes the face of our planet and the local distinctiveness of our environments. People have formed different types of cultural, spiritual, and subsistence-based relationships with the natural environment, adopting value-systems that go beyond economic framings.
Nature makes human development possible but our relentless demand for the earth’s resources is accelerating extinction rates and devastating the world’s ecosystems. Joyce Msuya , Deputy Executive Director, United Nations Environment Programme
The use of natural resources has long been considered an element of both human rights and economic development, leading the United Nations, amid its work on advancing decolonization in the 1960s, to declare that “[t]he right of peoples and nations to permanent sovereignty over their natural wealth and resources must be exercised in the interest of their national development and of the well-being of the people of the State concerned” ( UN General Assembly Resolution 1803 (XVII) ).
Natural resources are often viewed as key assets driving development and wealth creation. Over time and with progressive industrialization, resource use increased. In some cases, exploitation levels came to exceed resources’ natural regeneration rates. Such overexploitation ultimately threatens the livelihoods and wellbeing of people who depend on these resources, and jeopardizes the health of ecosystems. This risk of resource depletion, notably manifesting in the form of fishery collapses, demonstrates the need to regulate natural resource use to better preserve resources and their ecosystems. The very first UN conference on environmental issues, the 1972 UN Conference on the Human Environment held in Stockholm, Sweden, adopted fundamental principles in this regard.
Stockholm Declaration
- Principle 2: “The natural resources of the earth, including the air, water, land, flora and fauna and especially representative samples of natural ecosystems, must be safeguarded for the benefit of present and future generations through careful planning or management, as appropriate.”
- Principle 3: “The capacity of the earth to produce vital renewable resources must be maintained and, wherever practicable, restored or improved.”
- Principle 5: “The non-renewable resources of the earth must be employed in such a way as to guard against the danger of their future exhaustion and to ensure that benefits from such employment are shared by all mankind.”
The Stockholm Declaration not only addressed resource depletion, but also benefit sharing: the objective to ensure that natural resource use not only benefits the few, but the many, both within and across countries. It also speaks to the principle of inter-generational equity: ensuring that today’s resource use does not compromise the availability of natural resources for future generations. In fact, natural resource use relates to all three dimensions of sustainability: social justice, environmental health, and economic development. The sustainable use of natural resources strives for balance between these dimensions: maintaining the long-term use of resources while maximizing social benefits and minimizing environmental impacts.
Natural Resource Use Has More than Tripled since 1970
Although the 1972 Stockholm Declaration laid out the fundamental principles for sustainable resource governance, the state of play half a century later is sobering. The International Resource Panel (IRP), launched by the United Nations Environment Programme (UNEP), found that the global average of material demand per capita grew from 7.4 tons in 1970 to 12.2 tons in 2017, with significant adverse impacts on the environment, notably increased greenhouse gas emissions.
The IRP also showed that “the use of natural resources and the related benefits and environmental impacts are unevenly distributed across countries and regions” (IRP, 2019, p. 27). For one, the per capita material footprint in high-income countries is thirteen times more than in low-income countries: 27 tons and 2 tons per capita, respectively. As WWF notes , “If everyone lived like an average resident of the USA, a total of four Earths would be required to regenerate humanity’s annual demand on nature.” What’s more, since they generally rely on resource extraction in other countries, high income countries outsource part of the environmental and social impacts of their consumption. At the same time, the IRP has reported that “the value created through these traded materials in the countries of origin is relatively low” (IRP, 2019, p. 65). This imbalance highlights the global discrepancies in the distribution of benefits and negative impacts stemming from resource use, with countries “rich” in valuable resources not always benefitting from their extraction, distribution, and use, yet suffering the most environmental harm.
Human actions threaten more species with global extinction now than ever before. Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services 2019 Global Assessment Report on Biodiversity and Ecosystem Services
Fostering Sustainable Resource Governance
A vast array of norms, institutions, and actors influence decisions on natural resources, which is why we speak of natural resource governance. A plethora of national legislation, intergovernmental agreements, regional organizations, certification mechanisms, corporate codes of conduct, and multi-stakeholder partnerships create a complex web of rules affecting how natural resources are used and benefits thereof are distributed.
Since Stockholm, numerous multilateral agreements have developed a range of operational guidelines, targets, and standards. Some intergovernmental frameworks, such as the Convention on Biological Diversity (CBD) are broad in focus, while others are resource-specific ( Minamata Convention on Mercury ) or relate to a specific geographical area ( Convention on the Conservation of Antarctic Marine Living Resources ). Industry initiatives and multi-stakeholder partnerships often focus on specific resources or sectors. Examples of such initiatives include the Forest Stewardship Council , the Roundtable on Sustainable Palm Oil , the Extractive Industries Transparency Initiative , and the Better Cotton Initiative .
Citizens also have agency over natural resource use: through the representatives we elect to government, our activist engagement, and our consumption and transport choices. For instance, carefully considering food production cycles—what we eat, where and how it is grown, and how it arrives on our plate—can go towards addressing the impact that agricultural expansion has on forests, wetlands, and grassland ecosystems (FAO, 2018; IPBES, 2019). However, this needs to be coupled with systemic change across governance structures.
These mechanisms and institutions are not always complementary; in fact, at times they stand in conflict with one another. Consider, for instance, an energy corporation invoking the Energy Charter Treaty to file arbitration claims against a country’s decision to phase-out coal—a decision taken in accordance with its obligations under the Paris Agreement on Climate Change .
Balancing Rights and Interests over Natural Resources
Determining how people can—and should— access, benefit from, participate in decision-making on, and have responsibility over natural resources has been shaped by concepts such as property and rights .
On the one hand, property rights divide lands and territories into: private property, where rights are held by individuals or companies; common property, where rights are shared by a community; public property, where rights are held by government; and open access areas, where no specific rights are assigned (Aggrawal & Elbow, 2006). Property rights are closely tied to rights over natural resources, which include the right to use a resource, such as hunting in a forest; or management rights that grant authority to decide on use, for example imposing seasonal hunting restrictions. In terms of governance, different types of ownership and access rights can be held simultaneously by several actors: a wetland can be owned by the state, managed by a local council, and used as fishing grounds by communities.
The notion of tenure security indicates that an individual’s rights over natural resources and specific lands are recognized and enforceable. These rights are key to avoiding conflict and fostering social security as well as long-term sustainable resource use.
On the other hand, there are individual and collective rights regarding quality of life. The United Nations Declaration on the Rights of Peasants and Other People Working in Rural Areas ( UNDROP ), for example, stipulates that “[p]easants and other people working in rural areas have the right to have access to and to use in a sustainable manner the natural resources present in their communities that are required to enjoy adequate living conditions” and that they “have the right to participate in the management of these resources” (Article 5). UNDROP highlights the importance of small-scale sustainable practices, and the need to strengthen the protection and recognition of groups who have experienced historical marginalization and violent conflict over resource use.
Similarly, the UN Declaration on the Rights of Indigenous Peoples ( UNDRIP ) and International Labour Organization (ILO) Convention 169 ( ILO 169 ) protect the individual and collective rights of Indigenous Peoples. UNDRIP Article 8(2b) stipulates that states shall prevent and provide redress for “any action which has the aim or effect of dispossessing them of their lands, territories or resources.” Both texts also speak to the importance of ensuring the free, prior, and informed consent (FPIC) of Indigenous Peoples in relation to the use of their lands, with UNDRIP Articles 11(2) and 28 underscoring Indigenous Peoples’ right to redress for past FPIC infringements.
There is also the right to a healthy environment, enshrined in regional treaties, including procedural rights on access to information and decision-making processes, as well as the right to clean air, a safe climate, healthy food, safe water, a safe environment for work and play, and healthy ecosystems (UN Human Rights Council, 2019). Ultimately, the effectiveness of these advances in international law depends upon national governments’ readiness to implement them. To date, only 23 countries have ratified ILO 169, and many countries around the world have yet to adopt appropriate legislation to protect the rights enshrined in UNDRIP. To do so, and to protect associated rights under UNDROP and the right to a healthy environment, governments must adopt robust reforms across national policies, laws, programmes, and institutions that prompt shifts in country priorities and ensure the mainstreaming of environmental and social concerns across sectors, focusing especially on empowering marginalized groups. To ensure that decisions across society better address ecological and social wellbeing, prominent actors, including the UN Special Rapporteur on Human Rights and the Environment, are calling for human rights-based approaches to natural resource governance.
Overall, this constitutes a complex architecture, one that is dynamic in nature, often builds on customary practices, and requires balancing “competing” rights and interests through law and policy. Structures are seldom straightforward: there are often overlapping or even conflicting systems in place, and this influences the sustainability of resource governance.
States play a central role in balancing rights and interests. Regulations addressing the extractive sector determine how a corporation’s exclusive user rights may impact the general population’s right to a safe and healthy environment. Approaches to this balancing act, and the distribution, recognition, and safeguarding of rights, and the implementation of associated responsibilities, vary across states and change over time.
At times, this balance of interests favors more powerful actors. Stemming from historical legacies and trajectories in decision-making, structural inequalities exist across resource access, ownership, and tenure security (Oxfam, 2014). These issues disproportionately impact women , rural communities, and Indigenous Peoples, who are often cast as passive recipients to policy change, as opposed to rights holders and key actors in the sustainable management of natural resources.
Women have faced historical exclusion from decision-making processes related to land and resources (UN Women, 2020). Due to enduring patriarchal gender norms across the world, they hold less control than men over the lands and resources they traditionally use and rely on for their livelihoods and wellbeing. Based on an analysis of 180 countries, the Organisation for Economic Co-operation and Development (OECD) found that out of the 164 countries that explicitly recognize women’s rights to own, use, and make decisions regarding land on par with men, only 52 countries guarantee these rights in both law and practice (OECD, 2019). As such, it is important that states ensure that women’s rights over natural resources are realized and protected through appropriate mechanisms.
Indigenous Peoples also struggle to have their rights recognized. For instance, in Finland, Sweden, and Canada, legal disputes have arisen over the challenge of balancing between states’ sovereign right to govern and exploit natural resources, and Indigenous Peoples’ rights to self-determination over traditional territories and customary resource use. Globally, conflicts have also emerged over specific policy approaches, such as conservation methods relying on models of strictly protected areas, or the expansion of large infrastructure, such as the installation of hydraulic dams, which contribute to the displacement of Indigenous and rural peoples.
The expansion of international investment treaties further aggravates existing power differentials. In fostering the commercialization and privatization of land and resources, and by often prioritizing investors’ rights and interests over those held by local peoples, they risk restricting public-interest policies and undermine the public’s access to remedial action (Cotula, 2015, 2016).
The Need for Inclusive Governance
Activists and practitioners working to safeguard rights linked to natural resources and secure tenure have been lobbying for strengthened empowerment and participation of local groups, arguing that this fosters more sustainable and equitable resource governance. Alliances between women, youth, Indigenous Peoples, and local community groups have emerged, connecting local-to-global efforts, and bringing international attention to injustices. This includes grassroots alliances such as La Vía Campesina , which has lobbied to protect farmers’ and peasants’ rights since the 1990s and was instrumental in the creation and adoption of UNDROP.
Inclusive decision making is key for sustainable resource governance. Just as gender norms have influenced structures for access and use, they have also shaped our behaviors and the knowledge we acquire, with women holding unique agroecological expertise linked to crop resilience and nutrition (UN Women, 2018). So, unless decision-making processes are gender-responsive and inclusive, they risk overlooking women’s specific needs and roles, and will fail to ensure the inclusion of ecological knowledge important for enabling sustainable practices.
The same can be said for including Indigenous Peoples and local communities in resource governance. The second edition of the CBD’s Local Biodiversity Outlooks illustrates their significant contributions to the safeguarding and sustainable use of natural resources and biodiversity. Important benefits come with inclusive and community-led governance structures and decision-making processes, which, in addition to protecting and enabling sustainable use of resources, can strengthen community support systems and local economies, as well as revitalize Indigenous and local knowledges and languages.
The Need for Transformative Change
Despite efforts since the 1970s, current trends in natural resource use are unsustainable, with potentially devastating results. The 2019 IPBES Global Assessment Report underscored that transformative change is necessary to protect the resources upon which human life and wellbeing depends. The Report also acknowledges that, by its very nature, transformative change is often opposed by those with interests vested in the status quo. Civil society actors therefore underscore the importance for governments to address vested interests and foster inclusive decision making, along with a re-balancing of priorities with regards to rights and interests in order to ensure ecological integrity and social justice (Allan, et.al., 2019). The Local Biodiversity Outlooks mentioned earlier offer important examples of bottom-up approaches to resource governance that can foster sustainability while also addressing historical inequalities.
Bearing in mind global and local inequalities in the distribution of resource use and benefits, achieving transformative change requires bold governmental action, both domestically and in international fora. We need fundamental shifts in production and consumptions patterns, careful attention to value and supply chains, and the fostering of circular resource use and circular economies. Resource circularity breaks with the linear model of “extract-use-discard” towards a “waste-as-a-resource” model that fosters a reduced need for resource extraction, as well as encourages increased reuse, repair and recycling. These objectives are already enshrined in the 2030 Agenda for Sustainable Development , with governments aiming to achieve the sustainable management and efficient use of natural resources by 2030 . While implementation has been too slow (IPBES, 2019), there is increased attention to fostering resource circularity, hand in hand with efforts to promote secure labor standards and reduce environmental impacts of resource exploitation. Most notable in this regard are legislative initiatives that increase producers’ responsibility for the impacts of their products throughout their lifecycle. Placing responsibility for post-use disposal on manufacturers significantly increases the material recovery rate and incentivizes less wasteful product design (OECD, 2016).
To better balance the three dimensions of sustainable resources governance—social justice, environmental health, and economic development—we must rethink our economic, social, political, and technological systems that currently enable damaging production practices and wasteful resource consumption. Other ways of living are possible, from the ways we structure our societies and economies, the relationships we form with each other and with our ecosystems, to ensuring that the priorities of our leaders align with the interests of the many rather than the few. To realize these shifts, governments should develop extended producer responsibilities and supply chain legislation to enhance fairer distribution of benefits and harms stemming from resource use and promote the protection of human rights in ways that ensure ecological wellbeing and social justice.
Decision making must be inclusive and account for the needs, rights, and knowledges of historically marginalized communities and groups. Governance structures must recognize and support pre-existing sustainable practices at local and regional levels, as well as nourish the emergence of more sustainable patterns of resource use and management. This will require strengthening tenure rights and re-distributing power across all stages of decision-making.
Works Consulted
Aggarwal, S. & Elbow, K. (2016). The role of property rights in natural resource management, good governance and empowerment of the rural poor. USAID. https://www.land-links.org/wp-content/uploads/2016/09/USAID_Land_Tenure_Property_Rights_and_NRM_Report.pdf
Allan, J.I., Antonich, B., Bansard, J.S., Luomi, M., & Soubry, B. (2019). Summary of the Chile/Madrid Climate Change Conference: 2-15 December 2019. Earth Negotiations Bulletin , 12(775). https://enb.iisd.org/download/pdf/enb12775e.pdf
Cotula, L. (2015). Land rights and investment treaties. IIED. https://pubs.iied.org/sites/default/files/pdfs/migrate/12578IIED.pdf
Cotula, L. (2016). Rethinking investment treaties to advance human rights. IIED Briefing. https://pubs.iied.org/sites/default/files/pdfs/migrate/17376IIED.pdf
Food and Agriculture Organization of the United Nations. (2018). Sustainable food systems: Concept and framework. http://www.fao.org/3/ca2079en/CA2079EN.pdf
Forest Peoples Programme, International Indigenous Forum on Biodiversity, Indigenous Women’s Biodiversity Network, Centres of Distinction on Indigenous and Local Knowledge, & Secretariat of the Convention on Biological Diversity. (2020). Local biodiversity outlooks 2 . https://www.cbd.int/gbo/gbo5/publication/lbo-2-en.pdf
Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services. (2019). Global assessment report on biodiversity and ecosystem services. https://www.ipbes.net/global-assessment
International Resource Panel. (2019). Global resources outlook 2019: Natural resources for the future we want. UN Environment Programme. https://www.resourcepanel.org/reports/global-resources-outlook
Organisation for Economic Co-operation and Development. (2016). Extended producer responsibility: Updated guidance for efficient waste management. https://doi.org/10.1787/9789264256385-en
Organisation for Economic Co-operation and Development. (2019). Social institutions and gender index 2019 global report: Transforming challenges into opportunities. https://doi.org/10.1787/bc56d212-en
Oxfam. (2014). Even it up: Time to end extreme inequality. https://www-cdn.oxfam.org/s3fs-public/file_attachments/cr-even-it-up-extreme-inequality-291014-en.pdf
UN Human Rights Council. (2019). Report by the Special Rapporteur on the issue of human rights obligations relating to the enjoyment of a safe, clean, healthy and sustainable environment. A/HRC/43/53. https://undocs.org/A/HRC/43/53
UN Women (2018). Towards a gender-responsive implementation of the Convention on Biological Diversity. https://www.unwomen.org/en/digital-library/publications/2018/11/towards-a-gender-responsive-implementation-of-the-convention-on-biological-diversity
UN Women (2020). Realizing women’s rights to land and other productive resources. 2nd ed. https://www.unwomen.org/en/digital-library/publications/2020/10/realizing-womens-rights-to-land-and-other-productive-resources-2nd-edition
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Climate change is the defining issue that will greatly influence the way we manage land and natural resources for the foreseeable future. It will continue to be a crosscutting priority for our work because forests and rangelands are central to climate mitigation and adaptation.
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Faith-Based Participation in Natural-Resource Governance: Communities Defending Life and Territories in Brazil, Colombia, and Mexico
The World Resources Institute and the Laudato Si' Research Institute, Campion Hall, University of Oxford, in partnership with local researchers and communities in Brazil, Colombia and Mexico explore how religious actors shape strategies to find peaceful resolutions to socio-environmental disputes in their regions.
This Report is part of Faith and Sustainability within Equity & Governance . Reach out to Rocío Campos for more information.
- Rocío Campos
The report shows that faith communities are important, yet often neglected actors in socio-environmental disputes. It analyzes how these civil society actors bring a spiritual-symbolic dimension to their defense of human rights and territories. The report offers recommendations to international organizations, governments, civil society, and other stakeholders to recognize faith communities and their members as important environmental defenders and adopt a community approach to protecting them and supporting their visions for locally led development.
Key Findings:
- Faith communities are important yet often neglected actors in socio-environmental disputes. For Christian communities and the Catholic church in particular, our research highlights that they understand their actions as defense of life and territories rather than participation in natural-resource governance.
- Faith communities deploy strategies of defense that integrate a symbolic-spiritual, community, discursive, and socio-political dimension and that shape the search for alternative socioeconomic development models aimed at human and ecosystem flourishing.
- Faith communities are highly heterogeneous in their involvement in socio-environmental disputes. Among the most influential factors for positive involvement are being part of the lives of local communities, understanding ecological commitment as an expression of faith, and providing formation that links spirituality with social realities.
- Women play a leading role in defending life and territories, but their leadership is not given due recognition in ecclesial structures. Formally recognizing women’s leadership in faith communities is key for protecting the rights of rural, low-income, and Indigenous communities in socio-environmental disputes.
- This report recommends that international organizations, governments, civil society, and other stakeholders explicitly recognize faith communities and their members as important environmental defenders and adopt a community approach to protecting them and supporting their visions for locally led development.
Executive Summary:
With more than 80 per cent of the world’s population estimated to be affiliated with a religion, international development organizations have increasingly acknowledged the importance of religious actors in development policy and practice, including in health, education, climate change, and environmental issues. But the dynamics between religious actors and development processes at the local level and their dynamics of interaction with other actors in contesting or shaping development discourse and policies remains little understood. This report unpacks these dynamics within four local territories that are being profoundly transformed by an infrastructure or extractive industry project driven by certain narratives of social and economic development. The report does not purport to be yet another study of socio-environmental conflicts. Rather, it is a study of religious actors themselves, on their role in socio-environmental conflicts and the strategies they deploy toward what they understand as a peaceful resolution. What are the factors that lead religious actors to develop strategies to defend the rights of rural, low-income, and Indigenous communities in socio-environmental disputes, and how do they do so? This is the question this report seeks to answer in four territorial contexts.
The reason we selected Latin America and the countries of Brazil, Colombia, and Mexico to answer our research question is based on the economic, political, and religious context of these countries. Critically, for the coming decades the region contains a large amount of the minerals and natural resources needed for renewable energy. Civil and political rights have also deteriorated, and Latin America is now the most dangerous region to be an environmental defender, with Brazil, Colombia, and Mexico ranked among the countries with the highest murder rates of defenders, according to the latest data from Global Witness. The region remains the one with the largest Catholic population globally, with a growing Protestant population. Latin America has been the site of a large Indigenous social movement demanding ways of expanding economic and social opportunities without ecological destruction, which the movement has called “buen vivir” (good living), and which is based on a non-separation among human and other forms of life and the life of spirits. These social movements have also advocated for rights of nature beyond human rights. It is against such a background that we have chosen to focus our research to seek a greater understanding of the role that faith communities play in defending life in territories affected by extractive and infrastructure projects.
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Careers at the Library of Congress
Permanent ( u.s. citizens only ) research librarian (natural resources, energy, and earth science) (vacancy#: var002809).
- Opening Date : June 26, 2024
- Closing Date : July 26, 2024
- OPM Control Number : 797297300
- Vacancy Number : VAR002809
- LC Organization Unit : Congressional Research Service
- Grade : GS-11
- Series : 1410
- Minimum Salary : $82,764.00
- Maximum Salary : $107,590.00
- Availability : U.S. Citizens Only
- Telework Eligibility : Hybrid
The Congressional Research Service (CRS) seeks a Research Librarian to join its Resources, Science, and Industry Division, which supports the work of Congress in issue areas including earth sciences, natural resources, environmental policy, energy and minerals, agriculture and food, science, technology, transportation, and industry.
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This journal publishes quantitative studies of natural (mainly but not limited to mineral) resources exploration, evaluation and exploitation, including environmental and risk-related aspects. Typical articles use geoscientific data or analyses to assess, test, or compare resource-related aspects. NRR covers a wide variety of resources ...
Full article: Sustaining natural resources in a changing environment: evidence, policy and impact. Contemporary Social Science. Journal of the Academy of Social Sciences. Volume 13, 2018 - Issue 1: Sustaining natural resources in a changing environment: Guest edited by Linda Hantrais, Ruth Kattumuri and Ashley Thomas Lenihan. Free access.
Effects of Coal Thickness on the Fractal Dimension of Gas Migration Channels: Laboratory and Field Study of a Gassy Coal Mine. Risheng Zhuo. Pengxiang Zhao. Quan Jin. Original Paper 15 March 2024 Pages: 1193 - 1208.
The New York Cooperative Fish and Wildlife Research Unit was established at Cornell University in 1961. The New York unit is one of 40 units in 38 states established for the purpose of enhancing the management and conservation of our nation's natural resources. We work on natural resource issues of interest to our cooperators, with an ...
Theoretical framework. We consider a social welfare function, U T, that depends on the provision of some natural resource at the global scale, f(t), and on the consumption of the other goods ...
Explore the latest full-text research PDFs, articles, conference papers, preprints and more on NATURAL RESOURCES. Find methods information, sources, references or conduct a literature review on ...
Aims and scope. This journal publishes quantitative studies of natural (mainly but not limited to mineral) resources exploration, evaluation and exploitation, including environmental and risk-related aspects. Typical articles use geoscientific data or analyses to assess, test, or compare resource-related aspects. NRR covers a wide variety of ...
The Department of Natural Resources and the Environment is a world leader in scholarship addressing social and ecological dimensions of natural resources and the environment to improve ... See how our current work and research is bringing new thinking and new solutions to some of today's biggest challenges. Agriculture. Animals. Applied Economics.
1 INTRODUCTION. In developing countries, particularly in Africa, reliance on natural resources provides governments with a consistent source of revenue for investment in social services, such as electricity, water, sanitation, education, and health care (Noumba et al., 2022).This tends to resonate with Adam Smith's proposition that resource-rich countries can grow faster than those with poor ...
The World Resources Report is World Resources Institute's flagship publication. Each World Resources Report confronts an urgent, fundamental question, one that will help determine both how people everywhere and the natural ecosystems we depend on, can thrive. To explore possible answers, research teams launch new studies that harness WRI's ...
The goal of this Research Topic is to shed light on the progress made in the past decade in the field of Natural Resource Management and on its future challenges, thereby providing a thorough overview of the field. This article collection will inspire, inform, and provide direction and guidance to the current generation of researchers ...
This journal publishes quantitative studies of natural (mainly but not limited to mineral) resources exploration, evaluation and exploitation, including environmental and risk-related aspects. Typical articles use geoscientific data or analyses to assess, test, or compare resource-related aspects. NRR covers a wide variety of resources ...
There is a large volume of research and monitoring work that was catalyzed by the Blue Ribbon Panel and implemented by the many local, state, federal, Tribal, academic, and NGO partners, and yet there remain countless unknowns and few specific management actions for natural resource managers as they try to prepare, adapt, and manage for ...
The aim of this work was to map the current state of research in the area of agricultural products and food, identifying emerging fields to the geographical origin of products. The article is ...
Focusing on sustainability solutions and methods for preserving the natural environment, this critical multi-volume research work is a comprehensive resource for environmental conservationists ...
Natural Resources and the Environment Subject Guide — Research Topics. Description of databases, reference material, journals, books, etc. available for natural resources research. Overview; Starting Your Research Project; Research Topics; Searching Scholarly Databases; ... This work is licensed under a Creative Commons Attribution ...
Natural resources may adversely influences economic expansion of emerging economies. Summary of literature and research gap: after reviewing the prevailing literature, this study observed that most studies concerning tourism are biased toward its positive role in ECG. Specifically, these studies claimed that tourism enhances various economic ...
The use of natural resources has long been considered an element of both human rights and economic development, leading the United Nations, amid its work on advancing decolonization in the 1960s, to declare that "[t]he right of peoples and nations to permanent sovereignty over their natural wealth and resources must be exercised in the interest of their national development and of the well ...
Natural Resources. Gavin Bridge, Ryan Wyeth, in International Encyclopedia of Human Geography (Second Edition), 2020. Abstract. The term Natural Resources refers to the functional utility that societies derive from the environment and is widely used in human geography. "Natural" resources are also a deeply problematic term because the attribution of utility and value to the nonhuman world ...
Different regions have access to different renewable or nonrenewable natural resources such as freshwater, fossil fuels, fertile soil, or timber based on their geographic location and past geologic processes. Access, or the lack thereof, contributes to a place's economic development, political relationships, and culture. For example, the Great Plains region of the United States is known for ...
Volume 30 February - December 2021. Issue 6 December 2021. Issue 5 October 2021. Issue 4 August 2021. Special Issue on the ISME-XV: Toward Sustainable Society with Natural Resources - Development of Resource Exploration Technology in the Past Thirty Years and for the Future. Issue 3 June 2021.
Climate change is the defining issue that will greatly influence the way we manage land and natural resources for the foreseeable future. It will continue to be a crosscutting priority for our work because forests and rangelands are central to climate mitigation and adaptation.We need to provide more science information and tools to help land managers prepare for unlikely yet catastrophic ...
Planet: protecting the environment while ensuring sustainable use and management of natural resources.• Prosperity: ensuring environmentally sustainable economic growth, mutual prosperity, and decent work for all.• Peace: building societies that are peaceful, just and inclusive, and in which human rights and gender equality are respected.•
The reason we selected Latin America and the countries of Brazil, Colombia, and Mexico to answer our research question is based on the economic, political, and religious context of these countries. Critically, for the coming decades the region contains a large amount of the minerals and natural resources needed for renewable energy.
This includes predicting the impacts of natural hazards and extreme climate events on Earth and human systems, along with the impacts of wildfire, flooding, sea level rise and storm surges. We focus on understanding and mitigating environmental contamination and increasing the resiliency, security and sustainability of water resources.
ACS on Campus. The American Chemical Society's premier outreach program. Launched in 2010, we've hosted programming at hundreds of institutions around the world, bringing the world's leaders in chemistry, publishing, research, science communication and career development right to your doorstep.
Lab work: Conducted at University of Arizona campus when not in the field. (35% of time) 1. Principle Responsibilities: • Operates, maintains and troubleshoots scientific apparatuses, equipment and instruments. • Provide basic instruction to others on the use of this equipment. Collects and compiles research data.
The Congressional Research Service (CRS) seeks a Research Librarian to join its Resources, Science, and Industry Division, which supports the work of Congress in issue areas including earth sciences, natural resources, environmental policy, energy and minerals, agriculture and food, science, technology, transportation, and industry.
Natural Resources Job Board. OUR SPONSORS AND PARTNERS. ... RI DEM, Division of Fish and Wildlife is looking for a seasonal technician to work under the upland game bird biologist. This is an excellent opportunity for an individual looking for hands-on experience in wildlife management and a way to gain knowledge about the nuts and bolts of how ...
Claudia documents the challenges that are a result of poor management and economic development policies, and unsustainable use of natural resources in these regions in three short films in her blog. "In architecture, I am heavily interested in repurposing, looking back to ancient systems, and readapting to grow as a community," said Claudia ...