Ethics and Climate

Donald Brown

Ethics and Climate - Donald Brown

New Very Helpful Website on Climate Equity



The World Resources Institute (WRI) has created a new very helpful website that allows visual comparisons of up to four nations at a time up and up to eight of 24  variables at a time relevant to determining what equity requires of nations in formulating their climate policies. The website is called Equity Tracker and is available at: 

The above picture from the website demonstrates how one could visualize differences between nations on factors relevant to what equity requires of them and thereby understand why some nations must make much  deeper cuts than others as a matter of equity and justice.  This information could be very valuable in deepening citizen and government reflection on ethical, justice, and equity problems with national responses to climate change. As a matter of equity, for instance, the website help one quickly visualize why the United States must make deeper percentage cuts in its ghg emissions than India and the Democratic Republic of the Congo, not to mention China, for instance.

One minor criticism of the site is, however, in order. Although the website is very helpful to both help visualize and understand facts relevant to determinations of what equitable principles should guide national climate policy formation, particularly in regard to ghg emissions reduction targets, lamentably the site could be interpreted to leave the mistaken impression that equity could mean anything.  In fact the site says that the meaning of equity “depends upon the lens through which one views it.” The site could be improved if it included a reference to the IPCC discussion in Chapters 3 and 4 of Working Group III’s recent report which, among other things,  identifies  ethical limitations of economic arguments about climate policies and only a  limited number of considerations that should be considered in determining what equity means. For a summary of the IPCC conclusions on these issue see IPCC, Ethics, and Climate Change: Will IPCC’s Latest Report Transform How National Climate Change Policies Are Justified?. and Improving IPCC Working Group III’s Analysis on Climate Ethics and Equity, Second In A Series on this website.

The other idea one must understand to effectively criticize national ghg commitments is the policy implications of a carbon budget that must be maintained to limit warming to 2 degrees C.  If a citizen understands the equity considerations and the extraordinary urgency of lowering global emissions to limit warming to 2 degrees C,  then citizens can then effectively criticize their nation’s ghg emissions target. The following is one depiction of a carbon budget prepared by the Global Commons Institute with three different reductions pathways that make different assumptions about when global ghg emissions peak.



Donald A. Brown

Scholar in Residence and Professor

Widener University School of Law

At the UN Climate Talks, Thinking About Equity May Require Understanding the Conditions of Mutual Trust

Editor’s Note: The following entry is by guest blogger, Dr. Idil Boran, from  York University in Toronto, Canada. Dr. Boran has previously reported on equity and justice issues that arose in the recently concluded Bonn intercessional meetings of climate negotiations under the UNFCCC. This latest report was made at the conclusion of these negotiations during which almost no progress was made in defining equity under UNFCCC by the Ad Hoc Working Group on Durban Platform For  Enhanced Action (ADP), a mechanism under the UNFCCC that seeks to achieve a adequate global climate agreement, despite a growing consensus among most observers of the UNFCCC negotiations that nations need to align their emissions reductions commitments to levels required of them by equity and justice if the world is going to prevent extremely dangerous climate change.

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At the UN Climate Talks, Thinking About Equity May Require Understanding the Conditions of Mutual Trust

The UN Climate Conference held in Bonn, Germany, June 4-15, 2014, concluded in a generally positive tone. Much work has been done before COP 20 in Lima, where negotiators are expected to produce a fully written draft of the new agreement.

International talks on climate change have taken many twists and turns since the UNFCCC came into effect. In the current round of negotiations important shifts are occurring. As explained in a previous post, the new platform of negotiations favors the concept of global participation, where every nation is expected to do its part in some capacity. This is to replace the idea of common but differentiated responsibilities, which was the guiding principle of the negotiations in the Kyoto era. This principle was specially opted to capture a sense of equity within a binding global treaty. The current focus on global participation is to facilitate agreement and induce greater participation. But does this shift imply that the new agreement will have to make a compromise on the issue of equity?

Moral and political philosophers tend to think about equity in substantive terms, as claims about how to apportion the burdens and the benefits as part of a collective venture. The thinking is usually that of identifying an appropriate criterion of equity (a guiding principle) and then articulating an allocation of responsibilities from this criterion.

This way of thinking can be applied to many topics arising within the Framework Convention. Take, for example, the new issue at the heart of the multilateral negotiations: the Warsaw Mechanism on Loss and Damage associated with climate impacts in developing countries that are particularly vulnerable to the adverse effects of climate change. When the issue of loss and damage is raised, a standard approach that comes to mind is that of prescribing an allocation of the costs associated with loss and damage (human, economic, as well as non-economic costs) by a criterion of equity.

For example, historical accountability provides a morally powerful criterion. This is the idea that those who are historically responsible for the problem of climate change should provide the resources to deal with loss and damage. Ability to pay provides another criterion. Here the idea is that developed countries should take up the costs, simply because they are more wealthy. These arguments have been made for mitigation efforts, and they can also be made as new issues arise, such as the issue of an international mechanism on loss and damage.

But the reality is far more complex. However neat these substantive arguments are, they do not capture the layers of discussions that actually take place. In fact, most of the discussions regarding the Warsaw Mechanism, at this point in time, are not over substantive questions. They are focused on deciding on the rules and procedures, and the composition of the Executive Committee, whose mandate will be to develop the details of the mechanism. But the questions that arise at this procedural level are no less interesting. As discussions continue, developing countries who feel threatened by the effects of climate change will press for greater representation within the Committee, and developed countries, such as the United States and the E.U. will press more on the importance of securing the right team of experts regardless of country representation.

But why are developing countries vulnerable to the effects of climate change are pressing for more seats on the Committee? Clearly, when it comes to decisions made by the Executive Committee, they worry that their interests will not be taken into account, unless they secure greater representation.

So, it looks like there is a problem of trust that needs to be addressed at the heart of the deliberations. Within rightful conditions of collective decision-making, equitable terms of cooperation can be captured and agreed upon. And this is exactly what the new round of negotiations aims to achieve by 2015, with more flexibility conferred to countries in making their contributions to the climate effort. What remains to be done, then, is to work on the conditions that will promote trust between parties.

More than neat arguments from first principles, this may require specially talented people, with strong diplomatic skills working on the ground, who can foster a sense of building bridges, and a feel for working together on a global problem. This will also require the building of strong international institutions that put greater emphasis than ever on transparency, accountability, and governance.

At this juncture then, if equity is the concern, there are reasons to invest in understanding what, if at all, can generate more trust between parties at the UNFCCC. Figuring out what it takes to secure mutual trust is more an art than strict rational argumentation. It has something to do with creating a welcoming and inclusive atmosphere, as opposed to a hostile one where all hold their cards close to their chests. It therefore makes sense for academic researchers interested in the ethical, political, and legal aspects of climate talks to tune in to these dynamics.

As for the institutional structure of the UNFCCC, adopting the right institutional rules and procedures can help in fostering mutual trust. That’s why the new multilateral assessment and review processes under development are of special significance. So is the effort to agree on a common metric on emissions reduction, so to allow all parties to pitch in their contributions in a coherent way, and work together toward ratcheting them up in the future. This may not be a magic solution to the climate problem, but it can set the foundations of cooperation that’s not only equitable but durable too. If successful, it can set an important precedent.

That’s why all eyes will be on Lima in December 2014…


Dr. Idil Boran. Associate Professor &

Director of the Certificate Program in Practical Ethics

Department of Philosophy, Faculty of Liberal Arts and Professional Studies

Core Faculty Member

Institute for Research and Innovation in Sustainability (IRIS)

York University, Toronto Ontario


The Progression of Multilateral Talks on Climate Change and the Challenge of “Equity”: Notes from the UN Climate Conference in Bonn, June 2014

Editor’s Note: As the international community seeks to negotiate a new climate treaty to be completed in Paris in 2015, negotiations have been taking place during the last two weeks in Bonn, Germany as one of the sessions on the road to Paris. Today’s guest blogger, Dr. Idil Boran, from York University in Canada has submitted the following report on progress in Bonn during the first week. A central issue of concern in these negotiations is the need of nations to take equity and justice seriously when they make ghg emissions reductions commitments and when considering their responsibility for adaptation, losses and damages in poor vulnerable countries. Among close observers of the negotiations and the science informing these talks, there is widespread agreement that there is little hope of keeping warming to tolerable levels unless high-emitting nations base their emissions reductions promises on what equity would require of them.

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 The Progression of Multilateral Talks on Climate Change and the Challenge of “Equity”: Notes from the UN Climate Conference in Bonn, June 2014

The June sessions of the United Nations Framework Convention on Climate Change (UNFCCC) is taking place in Bonn, Germany, June 4-15, 2014. This is one of the “intersessional” meetings that take place at various times during the year between the meetings of the Conference of the Parties (COPs) annually held at the end of each year.

This year’s intersessional meetings are of special importance, the June session currently under way being a critical one. This is because multilateral negotiations on climate change are on a track to reach a comprehensive and legally binding agreement by the 21st session of the Conference of the Parties (COP 21), to be held in Paris at the end of 2015. But more importantly, everything to be agreed upon at COP 21 must be drafted at COP 20 the year before, that is in December 2014. It is the present intersessional meeting – taking place in June in Bonn – where the hard work needs to be done, so that all the substantive recommendations can be presented, negotiated, and drafted in Lima. In this spirit, the UN Climate Change Conference convened on June 4 with determination to achieve as much as possible before Lima.

At this point in time, the negotiations are at an important juncture. The goal for the international community is to draw lessons from the Kyoto Protocol era, and to articulate the terms of an entirely new system of cooperation for the Post-Kyoto era. In other words, the goal is to avoid the weaknesses of the Kyoto Protocol.

Given that the Kyoto Protocol was motivated by a well-defined conception of equitable distribution of responsibility, many questions arise at this juncture over how equity will be defined within the new agreement. Equity has always been central to multilateral negotiations on climate change. This makes sense for many reasons. First, climate change is expected to affect lives in important ways. Second, the way in which people’s lives will be affected is expected to be more severe in some places than others. Third, climate change is a phenomenon that is associated with human activity, which has been going on for some time and which is intertwined with economic development and growth. For these reasons alone, it becomes obvious to anyone with a sense of fairness that – to the extent that the international community is to cooperate on addressing the effects of climate change – the terms of cooperation ought to be fair.

new book description for website-1_01The terms of cooperation set by the Kyoto Protocol were devised in light of the principle of “common but differentiated responsibilities”. Given that industrialized nations are responsible for the problem of climate change, the idea was to adopt an allocation of responsibilities that requires developed nations to take up the bulk of the burden. This gave rise to roughly two categories of nations: those who are to assume the costs of curbing climate change by contrast to those who are not expected to do much. But this structure also became highly divisive and unable to generate agreement and compliance, which is desperately needed for action on climate change to be effective.

As part of the new rounds of negotiations, the UNFCCC adopted the Durban Platform for Enhanced Action at COP 17 in Durban in 2011, where negotiations were put on an ambitious track to work out the details of an entirely new international agreement by 2015. When it was first put in place, the Durban Platform did not include too many substantive decisions, for the objective was to allow the terms of international cooperation to be discussed and decided upon through negotiations from 2012 to 2015. The single prior decision that was made, however, was the rejection of the principle of “common but differentiated responsibilities” and the adoption of a principle of “universality” instead, as the central guiding principle of a post-Kyoto agreement. On this principle, all nations are to contribute to the cooperative scheme on climate change in some capacity. This shift gave the international community the opportunity to have a fresh start and to rethink the terms of cooperation on a (relatively) clean slate.

Additionally, the new international agreement under negotiation is one that is expected to have a richer composition than the Kyoto Protocol. The Kyoto Protocol was focused exclusively on mitigation through reduction of emissions. The new agreement is expected to have both a mitigation component and an adaptation component. Within the adaptation component, an International Mechanism on Loss and Damage associated with climate change impacts in developing countries vulnerable to the effects of climate change is being negotiated as well. This is an entirely novel issue under negotiations, and one with important implications for the philosophical, legal, and ethical aspects of international cooperation. In short, this broader range of issues adds significant dimension to the talks. The principle of “universality” may well be more suitable for this new round of negotiations, as the allocation of responsibility may need to be customized to each specific issue.

Contrary to what might seem at first blush, the principle of “universality” need not require every nation to assume exactly the same amount of costs and responsibilities for a given issue. So far, no one has suggested that. Negotiators are discussing how to achieve equitable conditions within a system of cooperation for each issue. Take the discussions on the Warsaw International Mechanism on Loss and Damage, adopted recently in Warsaw in November 2013. As the issue is still in its earlier stages, the discussions are mostly over procedural matters at this point. But the question of equity arises nevertheless, and remains a central concern. For example, representatives of countries that are particularly vulnerable to the threat of loss and damage associated with the adverse effects of climate change, such as the members of the Alliance of Small Island States (AOSIS), want to see greater representation of these countries in the decision-making body. There is an equity argument that motivates this request. A competing argument is that the advisory and decision-making bodies on this matter will secure more appropriate decisions if they are composed of members with the appropriate expertise, which may or may not align with regional or national affiliations. This argument, which is also motivated by a sense of justice, suggests that the expert-based composition will be conducive to decisions that would maximize the benefits to those whose interests are at stake.

How the discussions will unfold is yet to be seen, but the general parameters of the negotiations are such that equitable terms are to be discussed and tailored. The concept of “equity” is neither a monolithic nor an inert concept. It often needs to be formulated from within the concrete circumstances that make it relevant. Sometimes, equitable conditions devised for specific circumstances can become obsolete if circumstances change, and may need to be rethought and reformulated. Seen in this way, equity is not lost in this new round of negotiations, it is being worked out as new issues arise. Since any decision coming out of these negotiations will set precedents for future debates on international relations, it is important that the international community take the time to think through, and to carefully consider various (and sometimes conflicting) arguments, leaving no stone unturned.

The advantage of the present round of negotiations is that there is a general motivation to advance the debates in a productive way, and to reach a genuinely effective and mutually acceptable agreement. How the talks will unfold in the second week of the June session at the UNFCCC will set the tone for the Conference of the Parties (COP 20) in Lima. And for anyone interested in the philosophical, legal, and ethical dimensions of public policy and international cooperation, a close examination of the dynamics of the negotiations is worthwhile.


Idil Boran.

Associate Professor &

Director of the Certificate Program in Practical Ethics

Department of Philosophy, Faculty of Liberal Arts and Professional Studies

York University

Toronto Ontario, Canada

Improving IPCC Working Group III’s Analysis on Climate Ethics and Equity, Second In A Series.


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This is the second in a three part series examining the ethical and justice issues discussed by the IPCC Working Group III in its 5th Assessment Report (AR5) . In the first entry in  this series we concluded that although the recent IPCC AR 5 Working Group III report is laudable improvement over prior IPCC reports in regard to identifying ethical and equity issues that should be considered in developing climate change policy, some criticisms are also warranted of how IPCC has articulated the significance and implications of the ethical, justice, and equity principles that should guide nations in developing climate change policies.

In short, we will argue improvement is possible in how IPCC deals with ethics, justice, and equity issues entailed by climate change policy-making despite very significant improvements on these matters in the AR5 report compared to prior IPCC reports.

In this entry we will examine several preliminary ethical and justice issues raised by the new IPCC Working Group III Chapter 3, on Social, Economic, and Ethical Concepts.  The last entry will continue the examination Chapter 3 and then turn to Chapter 4 on Sustainable Development and Equity.

As a preliminary matter, one of the challenges that IPCC faces in its mandate on of ethics and justice issues relevant to climate change policy-making is that it is not IPCC’s role to be prescriptive in deciding what governments should do. It’s mandate is to synthesize the extant social-economic and scientific literature for policy-makers. In this regard, the IPCC chapter on ethics said expressly:

This chapter does not attempt to answer ethical questions, but rather provides policymakers with the tools (concepts, principles, arguments, and methods) to make decisions. (IPCC, 2014.WG III, Ch. 3, pg. 10)

And so it is not IPCC’s role to do ethical analyses of policy issues that raise ethical questions. IPCC can, however, distinguish between prescriptive and descriptive questions that arise in relevant socio-economic literature about climate policy-making, identify important ethical and justice issues that arise in this literature, where there is a consensus on ethics and justice issues in the relevant literature describe the consensus position, where there is no consensus on ethical and justice issues describe the range of reasonable views on these issues, and identify hard and soft law legal principles relevant to how governments should resolve ethical and justice issues that must be faced by policy-makers.

There are several subjects in climate change policy-making which raise important ethical and justice issues. They include policy judgements about:

  1. how much warming will be tolerated, a matter which is implicit but rarely identified when nations make ghg emissions reduction commitments,
  2. any nation’s fair share of safe global emissions, matters which are referred to by the IPCC usually as burden-sharing or effort-sharing considerations and a matter taken up in chapter 4 of IPCC, Working Group III chapter on sustainability and equity,
  3. any nation’s responsibility for funding reasonable adaptation and compensation for losses and damages for those who are harmed by climate change,
  4. when a nation is responsible for its ghg emissions given differences in historical and per capita emissions among nations,
  5. responsibility for funding technology transfer to poor nations,
  6. how to evaluate the effects on and responsibilities to others of climate change technologies that are adopted in response to the threat of climate change, including such technologies as geo-engineering or nuclear power, for instance,
  7. who has a right to participate in climate change policy-making, a topic usually referred to under the topic of procedural justice,
  8. the policy implications of human rights violations caused by climate change,
  9. the responsibility of not only nations but subnational governments, entities, organizations, and individuals for climate change,
  10. when economic analyses of climate change policy options can prescribe or limit national duties or obligations to respond to the threat of climate change,
  11. ethical and justice implications of decisions must be made in the face of scientific uncertainty,
  12. whether action or non-action of other nations is relevant to any nation’s responsibility for climate change,
  13. how to spend limited funds on climate change adaptation,
  14. when politicians may rely on their own uninformed opinion about climate change science,
  15. who is responsible for climate refugees and what their responsibilities are.

nw book advOn some of these issues, the recent IPCC report included a good summary of the extant ethical literature, on other issues important gaps in IPCC’s analysis can be identified, and lastly on a few of these issues, IPCC Working Group III is silent. IPCC reports cannot be expected to be exhaustive on these matters and therefore gaps and omissions in the IPCC reports in regard to ethics and justice issues relevant to policy-making is not necessarily a criticism of IPCC and is here pointed out only for future consideration. In fact, IPCC’s work on the ethical limits of economic arguments is a particularly important contribution to the global climate change debate. What is worthy of criticism, however, is if IPCC’s conclusions on guidance for policy-makers is misleading on ethics and justice issues.

II. Ethical Issues Raised by Economic Arguments About Climate Policy

Perhaps the most important practical ethical and justice issues raised by Working Group III’s work on ethics is its conclusions on the ethical and justice limitations of economic analyses of climate change policy options. This topic is enormously practically important because nations and others who argue against proposed climate change policies usually rely on various economic arguments which often completely ignore the ethical and justice limitations of these arguments (In the case of the United States, see Brown, 2012.) Because most citizens and policy-makers have not been trained in spotting ethically dubious claims that are often hidden in what appear at first glance to be “value-neutral” economic arguments, IPCC’s acknowledgement of the ethical limitations of economic arguments is vitally important.  It is also practically important because the first four IPCC reports, although not completely ignoring all ethical and justice problems with economic arguments about climate change policies, failed to examine the vast majority of ethical problems with economic arguments against climate change policies while making economic analyses of climate change policies the primary focus of Working Group III’s work thereby  leaving the strong impression that economic analyses, including but not limited to cost-benefit analyses, is the preferred way to evaluate the sufficiency of proposed climate change policies.  On this matter, the AR5 report has made important clarifications.

The AR5 III report included a section on this very issue entitled: Economics, Rights, and Duties which we reproduce here it  its entirety because of its importance to this discussion,  followed by comments in bold italics:

Economics can measure and aggregate human wellbeing, but Sections 3.2, 3.3 and 3.4 explain that wellbeing may be only one of several criteria for choosing among alternative mitigation policies.

Other ethical considerations are not reflected in economic valuations, and those considerations may be extremely important for particular decisions that have to be made. For example, some have contended that countries that have emitted a great deal of GHG in the past owe restitution to countries that have been harmed by their emissions. If so, this is an important consideration in determining how much finance rich countries should provide to poorer countries to help with their mitigation efforts. It suggests that economics alone cannot be used to determine who should bear the burden of mitigation.

What ethical considerations can economics cover satisfactorily? Since the methods of economics are concerned with value, they do not take into account of justice and rights in general. However, distributive justice can be accommodated within economics, because it can be understood as a value: specifically the value of equality. The theory of fairness within economics (Fleurbaey, 2008) is an account of distributive justice. It assumes that the level of distributive justice within a society is a function of the wellbeings of individuals, which means it can be reflected in the aggregation of wellbeing. In particular, it may be measured by the degree of inequality in wellbeing, using one of the standard measures of inequality such as the Gini coefficient (Gini, 1912), as discussed in the previous section. The Atkinson measure of inequality (Atkinson, 1970) is based on an additively separable social welfare function (SWF), and is therefore particularly appropriate for representing the prioritarian theory described in Section 3.4.6 . Furthermore, distributive justice can be reflected in weights incorporated into economic evaluations as Section 3.6 explains.

Simply identifying the level of inequality using the Gini Index does not assure that the harms and benefits of climate change policies will be distributed justly. For that a theory of just distribution is needed. The Gini index is also at such a level of abstraction that it is very difficult to use it as a way of thinking about the justice obligations to those most vulnerable to climate change. Even if there is strong economic equality in a nation measured by the Gini index, one cannot conclude that climate change policies are distributively just.

Economics is not well suited to taking into account many other aspects of justice, including compensatory justice. For example, a CBA might not show the drowning of a Pacific island as a big loss, since the island has few inhabitants and relatively little economic activity. It might conclude that more good would be done in total by allowing the island to drown: the cost of the radical action that would be required to save the island by mitigating climate change globally would be much greater than the benefit of saving the island. This might be the correct conclusion in terms of overall aggregation of costs and benefits. But the island’s inhabitants might have a right not to have their homes and livelihoods destroyed as a result of the GHG emissions of richer nations far away. If that is so, their right may override the conclusions of CBA. It may give those nations who emit GHG a duty to protect the people who suffer from it, or at least to make restitution to them for any harms they suffer.

Even in areas where the methods of economics can be applied in principle, they cannot be accepted without question (Jamieson, 1992; Sagoff, 2008). Particular simplifying assumptions are always required, as shown throughout this chapter. These assumptions are not always accurate or appropriate, and decision‐makers need to keep in mind the resulting limitations of the economic analyses. For example, climate change will shorten many people’s lives. This harm may in principle be included within a CBA, but it remains highly contentious how that should be done. Another problem is that, because economics can provide concrete, quantitative estimates of some but not all values, less quantifiable considerations may receive less attention than they deserve.

This discussion does not adequately capture serious ethical problems with translating all values into monetary units measured by willingness to pay or its surrogates nor that such transformation may greatly distort ethical obligations to do no harm into changes in commodity value.

The extraordinary scope and scale of climate change raises particular difficulties for economic methods (Stern, forthcoming). First, many of the common methods of valuation in economics are best designed for marginal changes, whereas some of the impacts of climate change and efforts at mitigation are not marginal (Howarth and Norgaard, 1992). Second, the very long time scale of climate change makes the discount rate crucial at the same time as it makes it highly controversial (see Section 3.6.2 ). Third, the scope of the problem means it encompasses the world’s extremes of wealth and poverty, so questions of distribution become especially important and especially difficult. Fourth, measuring non‐market values—such as the existence of species, natural environments, or traditional ways of life of local societies—is fraught with difficulty. Fifth, the uncertainty that surrounds climate change is very great. It includes the likelihood of irreversible changes to societies and to nature, and even a small chance of catastrophe. This degree of uncertainty sets special problems for economics. (Nelson, 2013) (IPCC, 2014.WG III, Ch. 3, pg. 12-13)

Again this discussion does not adequately describe the ethical problems with economic determinations of all values. In fact it leaves the impression that if non-market values can be discovered the problems of transforming all values to commodity values are adequately dealt with.

Chapter 3, also includes additional statements about the ethical limits of economic reasoning sprinkled throughout the chapter. They include:

1. Most normative analyses of solutions to the climate problem implicitly involve contestable ethical assumptions.(IPCC, 2014. WG III, Ch. 3, pg.10)

2. However, the methods of economics are limited in what they can do. They can be based on ethical principles, as Section 3.6 explains. But they cannot take account of every ethical principle. They are suited to measuring and aggregating the wellbeing of humans, but not to taking account of justice and rights (with the exception of distributive justice − see below), or other values apart from human wellbeing. (IPCC, 2014.WG III, Ch. 3, pg. 24)

And so Chapter 3 of the IPCC report contains a number or clear assertions  about the ethical limitations of economic arguments. However there are important gaps missing from this analysis. Also several sections of Chapter 3 that can be interpreted as claims that policy makers are free to choose economic reasoning as justification for climate policies. That is, some of the text reads as if a policy-maker is free to choose whether to base policy  on economic or ethical and justice considerations, choosing between these two ways of evaluation is simply an option. Some of these provisions follow with responses in italics

Chapter 3 page 6 says:

Many different analytic methods are available for evaluating policies. Methods may be quantitative (for example, cost‐benefit analysis, integrated assessment modeling, and multi‐criteria analysis) or qualitative (for example, sociological and participatory approaches). However, no single best method can provide a comprehensive analysis of policies. A mix of methods is often needed to understand the broad effects, attributes, trade‐offs, and complexities of policy choices; moreover, policies often address multiple objectives  (IPCC, 2014.WG III, Ch. 3, pg. 6)

Although economic analyses can provide policy-makers with valuable information such as which technologies will achieve ethically determined goals at lowest cost, thereby providing criteria for making remedies cost-effective, there are serious ethical problems with cost-benefit analyses used prescriptively to set emissions reductions targets. Some of these are alluded to in IPCC Chapters 3 and 4, others are not acknowledged. Because of the prevalence of cost-benefit justifications for climate change policies, future IPCC reports could make a contribution by identifying all of the ethical issues raised by cost-benefit analyses.

 Any decision about climate change is likely to promote some values and damage others. These may  be values of very different sorts. In decision making, different values must therefore be put together or balanced against each other. (IPCC, 2014. WG III, Ch. 3, pg. 6)

This provision can be understood as condoning a consequentialist approach to climate policy that fails to acknowledge deontological limits. Since when any nation makes policy on climate change it affects poor people and vulnerable nations around the world, there are serious procedural justice issues which go unacknowledged in this section and,  for the most part, all throughout Chapter 3. Nowhere does the chapter acknowledge that when a climate policy is  under development at the national level,  nations have no right to compare costs to them of implementing policies  with the harms to others that have not consented to the method of valuation being used to determine quantitative value.

Ideally, emissions should be reduced in each place to just the extent that makes the marginal cost of further reductions the same everywhere. One way of achieving this result is to have a carbon price that is uniform across the world; or it might be approximated by a mix of policy instruments (see Section 3.8 ). (IPCC, 2014.WG III, Ch. 3, pg. 26)

This statement fails to acknowledge that emissions reductions amounts should be different in different places according to well accepted principles of distributive justice. Although other sections of the chapter acknowledge that responsibility for climate change is a matter of distributive justice, this section and others leave the impression that climate policy can be based upon economic efficiency grounds alone. The way to cure this problem is to continue to reference other sections that recognize ethical limits in setting policy on the basis of efficiency.

(IPCC, 2014.WG III, Ch. 3, pg. 6)

Since, for efficiency, mitigation should take place where it is cheapest, emissions of GHG should be reduced in many developing countries, as well as in rich ones. However, it does not follow that mitigation must be paid for by those developing countries; rich countries may pay for mitigation that takes place in poor countries. Financial flows between countries make it possible to separate the question of where mitigation should take place from the question of who should pay for it. Because mitigating climate change demands very large‐scale action, if put in place these transfers might become a significant factor in the international distribution of wealth. Provided appropriate financial transfers are made, the question of where mitigation should take place is largely a matter for the  economic theory of efficiency, tempered by ethical considerations. But the distribution of wealth is amatter of justice among countries, and a major issue in the politics of climate change (Stanton, 2011). It is partly a matter of distributive justice, which economics can take into account, but compensatory justice may also be involved, which is an issue for ethics. (Section 3.3).(IPCC, 2014.WG III, Ch. 3, pg. 26)

There are a host of  potential ethical problems with mitigation taking place in one part of the world to satisfy the ethical obligations of a nation in another part of the world which is emitting above its fair share of safe global emissions that are not mentioned in this article. Included in these problems are:

  • Environmental Sufficiency. There are many technical challenges in assuring that a project in one part of the world that seeks to reduce ghg by an amount that otherwise would be required of a polluter will actually succeed in achieving the reductions particularly when the method of reduction is reliant on biological removal of carbon.
  • Permanence. Many proposed projects for reducing carbon in one part of the world to offset reductions ethically required in another part of the world raise serious questions about whether the carbon reduced by the project will stay out of the atmosphere forever, a requirement that is required to achieve the environmental equivalence to ghg emissions reductions that would be achieved at the source.
  • Leakage. Many proposed projects used to offset emissions reductions of high-emitters raise serious questions about whether carbon reduced by a project at one location will result in actual reductions in emissions because the activity which is the subject of the offset is resumed at another location.
  • Additionality. A project that is proposed in another part of the world to offset emissions reductions of a high-emitting entity may not be environmentally effective if the project would have happened anyway for other reasons.
  • Allowing Delay In Investing In New Technology. The ability to rely on a cheaper emissions reductions project in another part of the world as a substitute of reducing emissions creates an excuse for high-emitting entities to delay investment in technologies that will reduce the pollution load. This may create a practical problem when emissions reductions obligations are tightened in the future. 

Chapter 3 also treats other important ethical issues that arise in climate change policy formation. They include:

3.3 Justice, equity and responsibility,

3.3.1 Causal and moral responsibility

3.3.2 Intergenerational justice and rights of future people

3.3.3 Intergenerational justice: distributive justice

3.3.4 Historical responsibility and distributive justice

3.3.5 Intra‐generational justice: compensatory justice and historical responsibility

3.3.6 Legal concepts of historical responsibility

3.3.7 Geoengineering, ethics, and justice

3.4 Values and wellbeing

3.4.1 Non‐human values

3.4.2 Cultural and social values

3.4.3 Wellbeing

3.4.4 Aggregation of wellbeing

3.4.5 Lifetime wellbeing

3.4.6 Social welfare functions

3.4.7 Valuing population

III. Some Additional Gaps In Chapter 3

Some of the gaps in Chapter 3 on ethical issues raised by climate change policy-making include: (1) ethics of decision-making in the face of scientific uncertainty, (2) whether action or non-action of other nations affects a nation’s responsibility for climate change, (3) how to spend limited funds on climate change adaptation, (4) when politicians may rely on their own uninformed opinion about climate change science, and (5) who is responsible to for climate refugees and what are their responsibilities.

The last entry in this series will continue the analyses of IPCC  Chapter 3 on Social, Economic, and Ethical Concepts and Chapter 4 on Sustainability and Equity.


Brown, 2012,  Navigating the Perfect Moral Storm: Climate Change Ethics In Light of a Thirty-Five Year Debate, Routledge-Earthscan, 2012

Intergovernmental Panel on Climate Change (IPCC), 2014, Working Group III, Mitigation of Climate Change, –


Donald A. Brown

Scholar In Reference and Professor

Sustainability Ethics and Law

Widener University School of  Law



10 Reasons Why “Contraction and Convergence” Is Still The Most Preferable Equity Framework for Allocating National GHG Targets .


(The Contraction and Convergence Equity Framework)

I. Introduction

Perhaps the most challenging policy issue raised by climate change is how to fairly allocate responsibility among nations, regions, states, organizations, and individuals to reduce global greenhouse gas (ghg) emissions to non-dangerous levels. This problem is generally referred to as the problem of “equity” in the climate change regime. It a central issue in climate change policy formation because each government policy on reducing the threat of  climate change is implicitly a position on that government’s fair share of safe global emissions. In addition, climate change will continue to get worse unless each country reduces its emissions to its fair share of safe global emissions.  Therefore, “equity” is not only a challenging issue in forming climate policies, it is perhaps the most critical policy question facing the international community.

This article identifies 10 reasons why the equity framework known as “contraction and convergence” (C&C) is the most preferable of all the equity frameworks under serious discussion around the world.  The end of this paper will acknowledge some alleged limitations of C&C yet explain why these limitations should be dealt with in one of several possible ways while adopting the C&C framework internationally.

C&C was first proposed in 1990 by the London-based non-governmental Global new book description for website-1_01Commons Institute. (Meyer, 2000) ( GCI, 2009) Basically, C&C is not a prescription per se, but rather a way of demonstrating how a global prescription could be negotiated and organized. (Meyer, 1999:305) Implementing C&C requires two main steps. As a first step, countries must to agree on a long-term global stabilization level for atmospheric ghg concentrations. Although a warming limit of 2 degrees C has been preliminarily agreed to in international negotiations, subject to the acknowledged need to examine whether the limit should be reduced to 1.5 degrees C in studies that are underway, once a warming limit is finalized it must be translated into a ghg atmospheric concentration goal and then a global ghg emissions budget can be calculated. As a second step, countries need to negotiate a convergence date, that is a date at which time the emissions allocated to each country should converge on equal per-capita entitlements (“convergence”) while staying within the carbon budget. During the transition period, a yearly global limitation is devised which contracts over time as the per-capita entitlements of developed countries decrease while those of most developing countries increase. C&C would allow nations to achieve their per capita based targets through trading from countries that have excess allotments.

And so the heart of C&C is the idea that justice requires that rights to use the atmosphere as a carbon sink must be based upon the idea that all human beings have an equal right to use the global commons, the Earth’s atmosphere. Because it would be impossible to achieve equal per capita emissions allocations in the short-term, C&C allows higher emitting nations to converge on a equal per capita target at some future date thus giving these nations some time to achieve an equal per capita target goal.

II. 10 Reasons To Support C&C

C&C is the most preferable equity framework  for the following reasons:

1.  Climate change is a classic problem of distributive justice. Distributive justice holds that all people should be treated as equals in any allocation of public goods unless some other distribution can be justified on morally supportable grounds. And so distributive justice entails the idea that at all allocations of public goods should start with a with a presumption of equal rights to public goods. Yet, distributive justice does not require that all shares of public goods be equal but put puts the burden on those who want to move away from equal shares to demonstrate that their justification for their requested entitlement to non-equal shares is based upon morally relevant grounds. Therefore someone cannot justify his or her desire to use a greater share of public resources on the fact that he or she has blue eyes or that he or she will maximize his or her economic self-interest through greater shares of public goods because such justifications fail to pass the test of morally supportable justifications for being treated differently. Because C&C ends up at some time in the future with equal rights for all individuals to use the atmosphere as a sink, it is strongly consistent with theories of distributive justice. Although distributive justice would also allow for other morally relevant considerations to be considered in allocating ghg emissions that diverge from strict equality, including such considerations as historical ghg emissions levels, these other considerations can be built into a C&C framework either by negotiating the convergence dates in a C&C regime or in side-agreements on such issues as financing technologies for low-emitting nations at levels that would allow them to achieve per capita emissions limitations.  C&C therefore is strongly consistent with theories of distributive justice because equal per capita emissions is the ultimate outcome of C&C even if that outcome is modified to take into account other legitimate equitable issues in negotiations by changing the convergence date or in side-agreements that finance compliance for poor nations that need assistance in achieving equal per capita emissions limitations.

2.  Allocating ghg emissions on an equal per capita emissions basis is consistent with the virtually universally recognized ethical idea that all people should treat others as they wish to be treated. And so basing allocations on equal rights is  the least contentious of all ethical theories of how to allocate public goods. Although there are are other ethically relevant facts that arguably should be considered in an allocation of ghg emissions such as economic capability to reduce emissions  or historical emissions levels, these considerations are more controversial ethically particularly in  regard to how they are operationalized in setting a numeric targets and therefore are more amenable to negotiated settlements on issues such as when convergence on equal per capita levels will  be achieved rather than in setting basic allocation target levels.

3. Equal per capita emissions levels are also consistent with human rights theories about the duty to prevent climate change. That is, human rights are based upon the uncontroversial ethical theory that humans should treat each other as they would like to be treated because all people, regardless of where they are,  should be treated with respect. Since the outcome of C&C is equal per capita rights, it is completely consistent with the idea of treating all people with equal respect, the foundation of human rights obligations. Because climate change undeniably violates several non-controversial human rights including the right to life, security, and food among other rights, climate change is widely acknowledged as a human rights problem. If climate change allocations are considered to be in fulfillment of human rights duties, then arguments based upon economic self-interest in setting ghg emissions targets are not an acceptable justification for avoiding human rights obligations. This is so because human rights obligations are viewed to ethically trump other values such as economic self interest or utility maximization as has been explained in significant detail in recent entries on this website. If human rights are violated by climate change, costs to those causing climate change entailed by policies to reduce the threat of climate change are not relevant for policy. That is if a person is violating human rights, he or she should desist even if it is costly to them. Therefore because a C&C framework has the strongest obvious link to human rights, if it were agreed to by the international community it would provide a strong argument against those who refuse to limit their emissions to an equal per capita level on the bases of cost to them.

4. Setting a ghg emissions target based upon distributive justice requires consideration of facts determined by looking backward, such as levels of historical ghg emissions, and issues determined by looking forward, such as what amount of the global commons should each individual be entitled to for personal use. Only equal per capita entitlements to the use a global commons satisfies future focused allocations issues without ethical controversy.  And so an allocation that converges on equal per capita emissions allocations sometime in the future is more than any other allocation framework likely to be seen as universally just as far as future entitlements issues are concerned. And so, the C&C should be supported because it is most consistent with equal entitlements to use global commons resources.

5, The C&C framework is the simplest of the dozen or so equity allocation frameworks which have been seriously considered in international climate change negotiations. Because it is simpler, it will likely be easier to negotiate than the other equity frameworks which have received serious consideration. Its simplicity is derived from the fact that its focus is narrowly on climate change justice issues. Thus it is not complicated by other global injustice issues which are not climate change related yet which are considerations in some other equity frameworks . For instance, other proposed ghg allocation formula try and remedy economic injustice among nations, issues which are worthy of international attention yet greatly complicate the ethical issues which need to be considered in setting ghg targets. Because C&C is simple, it is very pragmatic.

6. Objections to equal per capita allocations have sometimes been made by representatives from high emitting nations such as the United States because of the enormous ghg emissions reductions which would be required of it to reach equal per capita emissions levels of diminishing allowable safe global emissions.  Yet emissions reductions that would be required of high emitting nations under other proposed equity frameworks would be even steeper because they take into considerations issues such as, for example, historical emissions, economic wealth of nations, and ability of nations to pay. For this reason C&C holds the best chance of being accepted by the international community compared to other equity frameworks provided other issues that raise legitimate equity concerns including historical emissions levels are taken into account in some way in climate negotiations. These other justice concerns should be understood to be refinements of C&C rather than replacements of C&C because the C&C framework was always flexible enough to take into account additional issues relevant to distributive justice.

7. Many observers of international global efforts to achieve a solution to climate change argue that there has been too much emphasis on the obligations of nations while obligations of individuals and regional governments have largely been ignored. These observers argue that this focus on nations has helped high-emitting individuals and regional governments to largely escape public scrutiny. Because C&C obligations are premised on determining the obligations of nations based upon equal per capita shares, C&C can be seamlessly applied to state and regional governments and individuals around the world. If, for instance, a C&C framework determines that the world should converge on a per capita emissions target of 2 tons per person by 2025, it is therefore a straightforward deduction to argue that all individuals around the world  should limit their emissions to be below 2 tons per person by 2025 at a minimum.

8. Some of the issues that proponents of other equity frameworks have argued  should be considered in allocating national emissions targets such as historical emissions or the level of economic development in poor countries are already in serious consideration in international climate change negotiation agenda focused  on such matters as: (a) financial responsibility for adaptation, (b) responsibility for loses and damages for climate change, and (c) financing of climate friendly technologies for developing countries. Because of this the ethical issues raised by historical emissions or economic ability of nations to achieve a per capita allocation could be relegated to other issues already being negotiated in international climate change negotiations while emissions allocations targets are allocated on the basis of C&C.

9. Establishing a norm that each person is only entitled to emit ghgs on an equal per capita basis would also help to draw lines about other contentious ethical issues raised by climate change such as how to count responsibility for historical emissions. Determining how to translate historical emissions into legal obligations raises a host of contentious issues including when to start counting historical emissions. This question could be simplified by first determining reasonable per capita emissions at various moments in history. In addition, determining  liability for future excess emissions could be simplified if there was an agreement on acceptable per capita emissions. And so looking at the problem of climate change through a per capita lens helps draw lines about other climate change policy matters which will need to be faced. Therefore the  establishment of a C&C framework would help with other policy questions that must be faced in the future.

10. Many have argued that responsibility for reducing ghg emissions should not only be based upon production of ghgs within a nation, the current presumption of international negotiations, but on products consumed  in a nation but produced in another nations in processes which emitted ghgs.  Although this shift from production ghg to consumption related ghg as a way of establishing national responsibility to achieve ghg emissions reduction targets is not likely to happen in the short-term, those who desire to assign liability on the basis of consumption could also use the C&C framework more easier than other proposed equity frameworks.

III. Limitations of C&C

Other proposed equity frameworks were developed to deal with a few alleged  limitations of C&C. (As we have explained, C&C was always flexible enough to deal with additional issues relevant to distributive justice and therefore these alleged criticisms did not take into considerations the inherent flexibility of C&C.)

For instance, a second allocation formula which has received serious attention by the international community is the Greenhouse Development Rights Framework ( GDR) (Baer et al., 2008). GDR was developed, according to its proponents, because C&C does not leave adequate ghg emissions to allow developing nations to develop to levels that would allow them to escape grinding poverty. And so, proponents of GDR argue that any targets developed under a C&C framework will not be fair to poor nations and therefore will not be accepted by developing nations. We agree that several additional equitable issues  including the justice dimensions of historical emissions levels must be dealt with for a C&C approach to be fair to low-emitting poor countries because emissions targets simply based upon equal per capita emissions to allocate the extraordinarily small carbon budget that is left to avoid dangerous climate change will leave almost nothing for low emitting nations to grow economically. The questions is not whether these issues need to be considered in setting targets, but rather how they are considered while maintaining the moral force of equal per capita rights to use the atmosphere as a carbon sink.

The Brazilian government has also developed a proposed equity framework based upon the need to take historical emissions levels seriously. Both the proposed GDR framework and the proposed Brazilian framework more directly deal with legitimate justice issues which are not expressly initially dealt with under C&C.  Yet C&C can be adopted in combination with other agreements and adjustments to C&C assumptions that deal directly with the equitable issues more directly considered by the other proposed equity frameworks. For instance, the convergence dates in the C&C framework can be modified to take into consideration s0me historical emissions issues. In addition, separate agreements on such matters  as financing carbon friendly technologies in poor, low emitting nations can deal with issues of need to assist developing nations achieve otherwise just ghg emissions targets.

In summary, some of the alleged limitations of  C&C can be dealt in other agreements while retaining the basic structure of C&C.  And so, for the 10 reasons above, the C&C should be adopted by the international community not withstanding the legitimate need to consider other issues relevant to distributive justice in setting ghg emissions reduction targets including levels of historical emissions and financial ability of poor nations to comply with per capita emissions limitations. For this reason, C&C is the most preferable and practical equitable framework for allocating climate change obligations among governments.


Baer, P., Athanasiou, T., Kartha, S., and Kemp-Benedict, E., (2008). The Greenhouse Development Rights Framework, Second Edition, November 2008.

Global Commons Institute, (GCI), ) 2010.

Meyer, A., (2000, Contraction and Convergence, The Global Solution to Climate Change, Ttones, UK: Green Books,


Donald A. Brown

Scholar in Residence and Professor, Sustainability Ethics and Law and Professor, Widener University School of LawPart-time Professor, Nanjing University of Science Information and Technology, Nanjing, China