Climate change poses grave threats to many people, including the most vulnerable. This prompts the question of who should bear the burden of combating ?dangerous? climate change. Many appeal to the Polluter Pays Principle. I argue that it should play an important role in any adequate analysis of the responsibility to combat climate change, but suggest that it suffers from three limitations and that it needs to be revised. I then consider the Ability to (...) Pay Principle and consider four objections to this principle. I suggest that, when suitably modified, it can supplement the Polluter Pays Principle. (shrink)

Several philosophers claim that the greenhouse gas emissions from actions like a Sunday drive are so miniscule that they will make no difference whatsoever with regard to anthropogenic global climate change (AGCC) and its expected harms. This paper argues that this claim of individual causal inefficacy is false. First, if AGCC is not reducible at least in part to ordinary actions, then the cause would have to be a metaphysically odd emergent entity. Second, a plausible (dis-)utility calculation reveals (...) that such actions have a not-insignificant amount of expected harm. One upshot is that the near-exclusive focus in the literature on AGCC as a collective action problem is too restricted. The paper also provides several moral psychological explanations of why it is so difficult to comprehend individual responsibility with regard to global phenomena, including a reappraisal of Thomas Nagel’s view of the absurd. (shrink)

This essay examines the relationship between climate change and human rights. It argues that climate change is unjust, in part, because it jeopardizes several core rights – including the right to life, the right to food and the right to health. It then argues that adopting a human rights framework has six implications for climate policies. To give some examples, it argues that this helps us to understand the concept of “dangerous anthropogenic interference” (UNFCCC, Article (...) 2). In addition to this, it argues that if we adopt a human rights framework then any climate policies should also honour human rights, and so mitigation policies, for example, should not compromise people’s enjoyment of their human rights. A third implication, I argue, is that in addition to duties of mitigation and adaptation there will also be – if rights are violated – duties of compensation too. (shrink)

In this paper I make the following claims. In order to see anthropogenic climate change as clearly involving moral wrongs and global injustices, we will have to revise some central concepts in these domains. Moreover, climate change threatens another value that cannot easily be taken up by concerns of global justice or moral responsibility.

Climate Change and the Moral Agent examines the moral foundations of climate change and makes a case for collective action on climate change by appealing to moralized collective self-interest, collective ability to aid, and an expanded understanding of collective responsibility for harm.

This paper examines what agents should do when others fail to comply with their responsibilities to prevent dangerous climate change. It distinguishes between six different possible responses to noncompliance. These include what I term (1) 'target modification' (watering down the extent to which we seek to prevent climate change), (2) ‘responsibility reallocation’ (reassigning responsibilities to other duty bearers), (3) ‘burden shifting I’ (allowing duty bearers to implement policies which impose unjust burdens on others, (4) 'burden shifting (...) II’ (allowing some to protect peoples rights in ways which impose otherwise unjustified burdens on the duty bearers, (5) 'compromising moral ideals' (permitting agents to compromise non-justice ideals that they are otherwise bound by); and (6) ‘promoting compliance (implementing policies and creating institutions which reduce noncompliance). It concludes by outlining a methodological framework for evaluating these options, and by setting out my tentative and provisional evaluation of which responses are the least bad. (shrink)

Environmental ethicists have not reached a consensus about whether or not individuals who contribute to climate change have a moral obligation to reduce their personal greenhouse gas emissions. In this paper, I side with those who think that such individuals do have such an obligation by appealing to the concept of integrity. I argue that adopting a political commitment to work toward a collective solution to climate change—a commitment we all ought to share—requires also adopting a (...) personal commitment to reduce one’s emissions. On these grounds, individuals who contribute to climate change have a prima facie moral duty to lower their personal greenhouse gas emissions. After presenting this argument and supporting each of its premises, I defend it from two major lines of objection: skepticism about integrity’s status as a virtue and concerns that the resulting moral duty would be too demanding to be morally required. I then consider the role that an appeal to integrity could play in galvanizing the American public to take personal and political action regarding climate change. (shrink)

Of this article's seven experiments, the first five demonstrate that virtually no Americans know the basic global warming mechanism. Fortunately, Experiments 2–5 found that 2–45 min of physical–chemical climate instruction durably increased such understandings. This mechanistic learning, or merely receiving seven highly germane statistical facts, also increased climate-change acceptance—across the liberal-conservative spectrum. However, Experiment 7's misleading statistics decreased such acceptance. These readily available attitudinal and conceptual changes through scientific information disconfirm what we term “stasis theory”—which some researchers (...) and many laypeople varyingly maintain. Stasis theory subsumes the claim that informing people about climate science may be largely futile or even counterproductive—a view that appears historically naïve, suffers from range restrictions, and/or misinterprets some polarization and correlational data. Our studies evidenced no polarizations. Finally, we introduce HowGlobalWarmingWorks.org—a website designed to directly enhance public “climate-change cognition.”. (shrink)

Climate change is projected to have very severe impacts on future generations. Given this, any adequate response to it has to consider the nature of our obligations to future generations. This paper seeks to do that and to relate this to the way that inter-generational justice is often framed by economic analyses of climate change. To do this the paper considers three kinds of considerations that, it has been argued, should guide the kinds of actions that (...) one generation should take if it is to treat both current and future people equitably. In particular it examines the case for what has been termed pure time discounting, growth discounting and opportunity cost discounting; and it assesses their implications for climate policy. It argues that none of these support the claims of those who think they give us reason to delay aggressive mitigation policies. It also finds, however, that the second kind of argument can, in certain circumstances, provide support for passing on some of the costs of mitigation to future generations. (shrink)

Part 1. Introduction -- Introduction: Navigating the Perfect Moral Storm in Light of a Thirty-Five Year Debate -- Thirty-Five Year Climate Change Policy Debate -- Part 2. Priority Ethical Issues -- Ethical Problems with Cost Arguments -- Ethics and Scientific Uncertainty Arguments -- Atmospheric Targets -- Allocating National Emissions Targets -- Climate Change Damages and Adaptation Costs -- Obligations of Sub-national Governments, Organizations, Businesses, and Individuals -- Independent Responsibility to Act -- Part 3. The Crucial Role (...) of Ethics in Climate Change Policy Making -- Why Has Ethics Failed to Achieve Traction? -- Conclusion: Navigating the Perfect Moral Storm. (shrink)

Walter Sinnott-Armstrong argues, on the relationship between individual emissions and climate change, that “we cannot claim to know that it is morally wrong to drive a gas guzzler just for fun” or engage in other inessential emissions-producing individual activities. His concern is not uncertainty about the phenomenon of climate change, nor about human contribution to it. Rather, on Sinnott-Armstrong’s analysis the claim of individual moral responsibility for emissions must be grounded in a defensible moral principle, yet (...) no principle withstands scrutiny. I argue thatthe moral significance of individual emissions is obscured by this critique. I offer a moral principle, the threshold-contribution principle, capable of withstanding Sinnott-Armstrong’s criticisms while also plausibly explaining what’s wrong with gas-guzzling joyrides and other gratuitous emissions-producing individual acts. (shrink)

Under the UNHCR definition of a refugee, set out in the 1967 Protocol Relating to the Status of Refugees, people fleeing their homes because of natural disasters or other environmental problems do not qualify for refugee status and the protection that come from such status. In a recent paper, "Who Are Refugees?", I defended the essentials of the UNHCR definition on the grounds that refugee status and protection is best reserved for people who can only be helped by granting them (...) refuge in a safe state for an indefinite period of time, and argued that this does not include most people fleeing from natural disasters. This claim is most strongly challenged by possibility of displacement from climate change. In this paper I will explore to what degree the logic of the refugee convention, as set out in my earlier paper, can and should be extended to those fleeing the results of climate change, and will argue that the logic of the refugee convention tells in favor of extending refugee protection to a portion of those who must flee their homes because of climate-change related environmental problems. (shrink)

Although actions of individuals do contribute to climate change, the question whether or not they, too, are morally obligated to reduce the GHG emissions in their responsibility has not yet been addressed sufficiently. First, I discuss prominent objections to such a duty. I argue that whether individuals ought to reduce their emissions depends on whether or not they exceed their fair share of emission rights. In a next step I discuss several proposals for establishing fair shares and also (...) take practical considerations into account. I conclude that individuals should not always be obliged to reduce their emissions to what is their fair share for they may depend on carbon-intensive structures. Instead, they have a Kantian imperfect duty to reduce their emissions ‘as far as can reasonably be demanded of them’. In addition, they should press governments to introduce proper regulation. At the end, I further specify both duties. (shrink)

In this paper I engage interdisciplinary conversation on inaction as the dominant response to climate change, and develop an analysis of the specific phenomenon of complacency through a critical-feminist lens. I suggest that Chris Cuomo's discussion of the “insufficiency” problem and Susan Sherwin's call for a “public ethics” jointly point toward particularly promising harm-reduction strategies. I draw upon and extend their work by arguing that extant philosophical accounts of complacency are inadequate to the task of sorting out what (...) it means to be complacent on climate change. I offer a sketch for an alternative account, which I take to be a start in the direction of mapping out a diverse array of “motivational vices” that need to be named, grappled with, and remedied. (shrink)

The human faculty of moral judgment is not well suited to address problems, like climate change, that are global in scope and remote in time. Advocates of ‘moral bioenhancement’ have proposed that we should investigate the use of medical technologies to make human beings more trusting and altruistic, and hence more willing to cooperate in efforts to mitigate the impacts of climate change. We survey recent accounts of the proximate and ultimate causes of human cooperation in (...) order to assess the prospects for bioenhancement. We identify a number of issues that are likely to be significant obstacles to effective bioenhancement, as well as areas for future research. (shrink)

Understanding climate change is becoming an urgent requirement for those in education. The normative values of education have long been closely aligned with the global, modernised world. The industrial model has underpinned the hidden and overt curriculum. Increasingly though, a new eco-centric orientation to economics, technology, and social organisation is beginning to shape up the post-carbon world. Unless education is up to date with the issues of climate change, the estate of education will be unable to (...) meet its task of knowledge transfer. This paper covers the basic science and ethical policy debates, and begins to outline the questions that will necessarily entangle education as we orientate ourselves to the new world that is upon us. (shrink)

Two kinds of philosophical questions are raised by the current public debate about climate change; epistemic questions (Whom should I believe? Is climate science a genuine science?), and ethical questions (Who should bear the burden? Must I sacrifice if others do not?). Although the former have been central to this debate, professional philosophers have dealt almost exclusively with the latter. This book is the first to address both the epistemic and ethical questions raised by the climate (...) change debate and examine the relationship between them. (shrink)

The Intergovernmental Panel on Climate Change has developed a novel framework for assessing and communicating uncertainty in the findings published in their periodic assessment reports. But how should these uncertainty assessments inform decisions? We take a formal decision-making perspective to investigate how scientific input formulated in the IPCC’s novel framework might inform decisions in a principled way through a normative decision model.

What does it matter if the climate changes? This kind of question does not admit of a scientific answer. Natural science can tell us what some of its biophysical effects are likely to be; social scientists can estimate what consequences such effects could have for human lives and livelihoods. But how should we respond? The question is, at root, about how we think we should live—and different people have myriad different ideas about this. The distinctive task of ethics is (...) to bring some clarity and order to these ideas. (shrink)

Anthropogenic climate change is a global process affecting the lives and well-being of millions of people now and countless number of people in the future. For humans, the consequences may include significant threats to food security globally and regionally, increased risks of from food-borne and water-borne as well as vector-borne diseases, increased displacement of people due migrations, increased risks of violent conflicts, slowed economic growth and poverty eradication, and the creation of new poverty traps. Principles of justice are (...) statements of what persons are owed either by others or by institutions and policies. Climate change gives rise to many concern of justice. This article briefly summarizes some of the most important of these, including claims to have climate change mitigated, claims regarding the sharing of the costs of climate change mitigation, claims for investment into adaptation, and claims to be compensated. (shrink)

Climate change is undeniably a global problem, but the situation is especially dire for countries whose territory is comprised entirely or primarily of low-lying land. While geoengineering might offer an opportunity to protect these states, international consensus on the particulars of any geoengineering proposal seems unlikely. To consider the moral complexities created by unilateral deploy- ment of geoengineering technologies, we turn to a moral convention with a rich history of assessing interference in the sovereign affairs of foreign states: (...) the just war tradition. We argue that the just war framework demonstrates that, for these nations, geoengineering offers a justified form of self-defense from an unwar- ranted, albeit unintentional, aggression. This startling result places our own car- bon-emitting activities in a stark new light: in perpetrating climate change, we are, in fact, waging war on the most vulnerable. (shrink)

Discounting future costs and benefits is often defended on the ground that our descendants will be richer. Simply to treat the future as better off, however, is to commit an ecological fallacy. Even if our descendants are better off when we average across climate change scenarios, this cannot justify discounting costs and benefits in possible states of the world in which they are not. Giving due weight to catastrophe scenarios requires energetic action against climate change.

Climate change harms health and damages and diminishes environmental resources. Gradually it will cause health systems to reduce services, standards of care, and opportunities to express patient autonomy. Prominent public health organizations are responding with preparedness, mitigation, and educational programs. The design and effectiveness of these programs, and of similar programs in other sectors, would be enhanced by greater understanding of the values and tradeoffs associated with activities and public policies that drive climate change. Bioethics could (...) generate such understanding by exposing the harms and benefits in different cultural, socioeconomic, and geographic contexts, and through interdisciplinary risk assessments. Climate change is a bioethics problem because it harms everyone and involves health, values, and responsibilities. This article initiates dialog about the responsibility of bioethics to promote transparency and understanding of the social values and conflicts associated with climate change, and the actions and public policies that allow climate change to worsen. (shrink)

In this essay I present an overview of the problem of climate change, with attention to issues of interest to feminists, such as the differential responsibilities of nations and the disproportionate “vulnerabilities” of females, people of color, and the economically disadvantaged in relation to climate change. I agree with others that justice requires governments, corporations, and individuals to take full responsibility for histories of pollution, and for present and future greenhouse gas emissions. Nonetheless I worry that (...) an overemphasis on household and personal-sphere fossil fuel emissions distracts from attention to higher-level corporate and governmental responsibilities for addressing the problem of climate change. I argue that more attention should be placed on the higher-level responsibilities of corporations and governments, and I discuss how individuals might more effectively take responsibility for addressing global climate change, especially when corporations and governments refuse to do so. (shrink)

Social scientists have offered a number of explanations for why Americans commonly deny that human-caused climate change is real. In this paper, I argue that these explanations neglect an important group of climate change deniers: those who say they are on the side of science while also rejecting what they know most climate scientists accept. I then develop a “nature of science” hypothesis that does account for this group of deniers. According to this hypothesis, people (...) have serious misconceptions about what scientific inquiry ought to look like. Their misconceptions interact with partisan biases to produce denial of human-caused climate change. After I develop this hypothesis, I propose ways of confirming that it is true. Then I consider its implications for efforts to combat climate change denial and for other cases of public rejection of science. (shrink)

This paper examines explore the issues of intergenerational equity raised by climate change. A number of different reasons have been suggested as to why current generations may legitimately favor devoting resources to contemporaries rather than to future generations. These - either individually or jointly - challenge the case for combating climate change. In this paper, I distinguish between three different kinds of reason for favoring contemporaries. I argue that none of these arguments is persuasive. My answer (...) in each case appeals to the concept of human rights. It maintains that a human rights-centered perspective to climate change enables us to address each of these reasons. (shrink)

The evidence most of us have for our beliefs on global climate change, the extent of human contribution to it, and appropriate anticipatory and mitigating actions turns crucially on epistemic trust. We extend trust or distrust to many varied others: scientists performing original research, intergovernmental agencies and those reviewing research, think tanks offering critique and advocating skepticism, journalists transmitting and interpreting claims, even social systems of modern science such as peer-reviewed publication and grant allocation. Our personal experiences and (...) assessments of evidential indicators themselves may be buttressed significantly by trust, not just in. (shrink)

There are a number of cases where, collectively, groups cause harm, and yet no single individual’s contribution to the collective makes any difference to the amount of harm that is caused. For instance, though human activity is collectively causing climate change, my individual greenhouse gas emissions are neither necessary nor sufficient for any harm that results from climate change. Some (e.g., Sinnott-Armstrong) take this to indicate that there is no individual moral obligation to reduce emissions. There (...) is a collective action problem here, to which I offer a solution. My solution rests on an argument for a (sometimes) bare moral difference between intending harm and foreseeing with near certainty that harm will result as an unintended side-effect of one’s action. I conclude that we have a moral obligation to reduce our individual emissions; and, more broadly, an obligation to not participate in many other harmful group activities (e.g., factory-farming). (shrink)

Given that mitigating climate change is a large-scale global issue, what obligations do individuals have to lower their personal carbon emissions? I survey recent suggestions by Walter Sinnott-Armstrong and Dale Jamieson and offer models for thinking about their respective approaches. I then present a third model based on the notion of structural violence. While the three models are not mutually incompatible, each one suggests a different focus for mitigating climate change. In the end, I agree with (...) Sinnott-Armstrong that people have limited moral obligations to directly lower personal emissions, but I offer different reasons for this conclusion, namely that the structural arrangements of our lives place a limit on how much individuals can restrict their own emissions. Thus, individuals should focus their efforts on changing the systems instead, which will lead to lower emissions on a larger scale. (shrink)

If climate change represents a severe threat to humankind, why then is response to it characterized by inaction at all levels? The authors argue there are two complementary explanations for the lack of motivation. First, our moral judgment system appears to be unable to identify climate change as an important moral problem and there are pervasive doubts about the agency of individuals. This explanation, however, is incomplete: Individual emitters can effectively be held morally responsible for their (...) luxury emissions. Second, doubts about individual agency have become overly emphasized and fail to convincingly exonerate individuals from responsibility. This book extends the second explanation for the motivational gap, namely that the arguments for the lack of individual agency do in fact correspond to mechanisms of moral disengagement. The use of these mechanisms enables consumption elites to maintain their consumptive lifestyles without having to accept moral responsibility for their luxury emissions. (shrink)

Obstacles to achieving a global climate treaty include disagreements about questions of justice raised by the UNFCCC's principle that countries should respond to climate change by taking cooperative action "in accordance with their common but differentiated responsibilities and respective capabilities and their social and economic conditions". Aiming to circumvent such disagreements, Climate Change Justice authors Eric Posner and David Weisbach argue against shaping treaty proposals according to requirements of either distributive or corrective justice. The USA's (...) climate envoy, Todd Stern, takes a similar position. In this article I explain the practical and theoretical drawbacks of Posner & Weisbach's welfarist perspective and propose an alternative. I show that their arguments fail to rule out John Rawls' non-utilitarian, political conception of international justice and human rights, the Law of Peoples. On this basis I develop a conception of climate justice that highlights implications of some of Rawls' principles and adds a principle for determining fair shares of climate -treaty-related benefits and burdens. I propose this conception as a moral framework for negotiating a treaty that would promote human welfare consistently with requirements of justice, and I argue that a treaty proposal satisfying these requirements could best satisfy Posner & Weisbach's own feasibility criteria. (shrink)

Liberalism faces a tension between its commitment to minimal interference with individual liberty and the urgent need for strong collective action on global climate change. This paper attempts to resolve that tension. It does so on the one hand by defending an expanded model of collective moral responsibility, according to which a set of individuals can be responsible, qua ?putative group?, for harm resulting from the predictable aggregation of their individual acts. On the other, it defends a collectivized (...) version of the harm principle. The claim is that the collectivized principle pushes the burden of argument, against coercively enforced measures to curtail climate change and compensate its victims, onto the global elite collectively responsible for environmental harms. Some such potential arguments are briefly considered and rejected. (shrink)

Is drastic action against global warming essential to avoid impoverishing our descendants? Or does it mean robbing the poor to give to the rich? We do not yet know. Yet most of us can agree on the importance of minimising expected deprivation. Because of the vast number of future generations, if there is any significant risk of catastrophe, this implies drastic and expensive carbon abatement unless we discount the future. I argue that we should not discount. Instead, the rich countries (...) should stump up the funds to support abatement both for themselves and the poor states of the world. Yet to ask the present generation to assume all the costs of drastic mitigation.is unfair.Worse still, it is politically unrealistic.We can square the circle by shifting part of the burden to our descendants. Even if we divert investment from other parts of the economy or increase public debt, future people should be richer, so long as we avert catastrophe. If so, it is fair for them to assume much of the cost of abatement.What we must not do is to expose them to the threat of disaster by not doing enough. (shrink)

From the paper's conclusion: "In conclusion, I have distinguished between two Rawlsian arguments for the SPP [strong precautionary principle] with respect to CCCs [climate change catastrophes]. Although both are persuasive, ultimately the “unbear-able strains” argument provides the most powerful categorical grounds for takingprecautionary action against CCCs. Overall, I have argued that the nature of CCCs requires us to take drastic precautions against further CC that could lead us to passthe tipping points that cause them. This is the case (...) notwithstanding the fact that weare in a state of strong uncertainty with respect to these events; indeed, our stronguncertainty with respect to them—given their nature—makes the case for action toprevent them even more persuasive, from the point of view of justice. Some peopletranslate the strong uncertainty of CCCs into weak uncertainty in order to justifytaking precautionary action using risk assessment.59My argument is complemen-tary to theirs. If divergent approaches to the uncertainty of CCCs neverthelessconverge on the PP, then we have what Cass Sunstein calls an “incompletelytheorized agreement” on a policy, that is, an agreement to which parties divided byoften deep theoretical differences can nevertheless give their assent,60which isall to the good from a political point of view. In the specific case of CC and itspossible catastrophes, the fact that such an agreement has emerged provides asliver of hope in the face of the increasingly dismal prospects for the planetuncovered by CC science as it progresses. At the level of principle, we are agreed,whatever justificatory reasons we advance. What is needed now—in the immedi-ate present—is policy to promote our principles, and the political will to enact it.". (shrink)

This article addresses the implications of rapid and uncertain ecological change, and global climate change in particular, for reserve oriented and restoration oriented ecosystem management. I argue for the following conclusions: (1) rapid and uncertain ecological change undermines traditional justifications for reserve oriented and restoration oriented ecosystem management strategies; (2) it requires rethinking ecosystem management goals, not just developing novel strategies (such as assisted colonization) to accomplish traditional goals; (3) species preservation ought to be deemphasized as (...) an ecosystem management goal; (4) reserve oriented ecosystem management remains well justified, but the goals for it must be revised. (shrink)

Climate change poses a serious problem for established ethical theories. There is no dearth of literature on the subject of climate ethics that break down the complexity of the issue, thereby enabling one to arrive at partial conclusions such as: 'historical justice demands us to do this...' or 'intergenerational justice demands us to do that...'. In contrast, this article attempts to face up to this complexity, that is: to end with a synthesis of the arguments into what (...) can be considered to be the most reasonable and fairest approach to the politics of climate change on a global scale. A significant part of the paper is devoted to the questions whether or not a) historical emissions and b) population changes are relevant to how emissions rights should be distributed. I discuss the merits and drawbacks of each perspective and briefly outline the normative justifications. (shrink)

Facing the facts about climate change and our failure to tackle it is an uncomfortable experience. For many people, these facts and our failures to date justify despair about our prospects for doing what it takes to properly address the problems of climate change by moving to a zero-carbon economy. It is not obvious that people in despair about tackling climate change are making a mistake. Consider the following reflections.A recent paper in Nature reports (...) that the Arctic sea ice is shrinking at a rate far faster than predicted by any climate models (Whiteman, Hope, and Wadham 2013). Its authors estimate that summer sea ice in the Arctic could be gone as early as 2015. As the ice retreats, seawater will warm so as .. (shrink)

This article critically examines a recent philosophical debate on the role of values in climate change forecasts, such as those found in assessment reports of the Intergovernmental Panel on Climate Change. On one side, several philosophers insist that the argument from inductive risk, as developed by Rudner and Douglas among others, applies to this case. AIR aims to show that ethical value judgments should influence decisions about what is sufficient evidence for accepting scientific hypotheses that have (...) implications for policy issues. Advocates of extending AIR to climate science claim that values are deeply... (shrink)

Belief polarization is said to occur when two people respond to the same evidence by updating their beliefs in opposite directions. This response is considered to be “irrational” because it involves contrary updating, a form of belief updating that appears to violate normatively optimal responding, as for example dictated by Bayes' theorem. In light of much evidence that people are capable of normatively optimal behavior, belief polarization presents a puzzling exception. We show that Bayesian networks, or Bayes nets, can simulate (...) rational belief updating. When fit to experimental data, Bayes nets can help identify the factors that contribute to polarization. We present a study into belief updating concerning the reality of climate change in response to information about the scientific consensus on anthropogenic global warming. The study used representative samples of Australian and U.S. participants. Among Australians, consensus information partially neutralized the influence of worldview, with free-market supporters showing a greater increase in acceptance of human-caused global warming relative to free-market opponents. In contrast, while consensus information overall had a positive effect on perceived consensus among U.S. participants, there was a reduction in perceived consensus and acceptance of human-caused global warming for strong supporters of unregulated free markets. Fitting a Bayes net model to the data indicated that under a Bayesian framework, free-market support is a significant driver of beliefs about climate change and trust in climate scientists. Further, active distrust of climate scientists among a small number of U.S. conservatives drives contrary updating in response to consensus information among this particular group. (shrink)

Does the receipt of benefits from some common resource create an obligation to contribute toward its maintenance? If so, what is the basis of this obligation? I consider whether individual contributions to climate change can be impugned as wrongful free riding upon the stability of the planet's climate system, when persons enjoy its benefits but refuse to bear their share of its maintenance costs. Two main arguments will be advanced: the first urges further modification of H.L.A. Hart’s (...) “principle of fairness” as the basis for demanding that would-be free riders pay their fair share in the context of climate change, while the second claims that remedial action on climate change is better captured through collective action analysis than through harm principles that seek to connect individual actions to bad environmental outcomes. (shrink)

This chapter qualitatively lays out some of the ways that climate change impacts are evaluated in integrated assessment models (IAMs). Putting aside the physical representations of these models, it first discusses some key social or structural assumptions, such as the damage functions and the way growth is modeled. Second, it turns to the moral assumptions, including parameters associated with intertemporal evaluation and interpersonal inequality aversion, but also assumptions in population ethics about how different-sized populations are compared and how (...) we think about distributing goods across or within times. The intention is to survey the morally important assumptions that go into estimates of the social cost of carbon, the marginal cost of an additional tonne of carbon dioxide to society. (shrink)

Climate ethics has been concerned with polluter pays, beneficiary pays and ability to pay principles, all of which consider climate change as a single negative externality. This paper considers it as a constellation of externalities, positive and negative, with different associated demands of justice. This is important because explicitly considering positive externalities has not to our knowledge been done in the climate ethics literature. Specifically, it is argued that those who enjoy passive gains from climate (...) change owe gains not to the net losers, but to the emitters, just as the emitters owe compensation to the net losers for the negative externality. This is defended by appeal to theoretical virtues and to the social benefits of generating positive externalities, even when those positive externalities are coupled with far greater negative externalities. We call this the Polluter Pays, Then Receives ('PPTR', or 'Peter') Principle. This principle is then applied at two levels in the context of Canada. [Open access]. (shrink)

Climate change adaptation is largely a local matter, and adaptation planning can benefit from local climate change projections. Such projections are typically generated by accepting climate model outputs in a relatively uncritical way. We argue, based on the IPCC’s treatment of model outputs from the CMIP5 ensemble, that this approach is unwarranted and that subjective expert judgment should play a central role in the provision of local climate change projections intended to support decision-making.

The use of apocalyptic and post apocalyptic narratives to interpret the risk of environmental degradation and climate change has been criticized for too often making erroneous predictions on the basis of too little evidence, being ineffective to motivate change, leading to a discounting of present needs in the face of an exaggerated threat of impending catastrophe, and relying on a pre-modern, Judeo-Christian mode of constructing reality. Nevertheless, “Apocalypse,” whether understood in its technical sense as “revelation” or in (...) its popular sense as “end of the world as we know it,” remains a powerful way of creatively reimagining the world and of introducing questions of value and significance into discussions of climate change. (shrink)

Discussions of where the costs of climate change adaptation and mitigation should fall often focus on the 'polluter pays principle' or the 'ability to pay principle'. Simon Caney has recently defended a 'hybrid view', which includes versions of both of these principles. This article argues that Caney's view succeeds in overcoming several shortfalls of both principles, but is nevertheless subject to three important objections: first, it does not distinguish between those emissions which are hard to avoid and those (...) which are easy to avoid; second, its only partial reference to all-things-considered justice means it cannot provide a full account even of climate justice; and third, it assigns to the poor very limited duties to meet climate change costs, even where they have created those costs, which may incentivise them to increase emissions. An alternative pluralistic account which avoids these objections is presented. (shrink)

A prominent argument in the climate ethical literature is that individual polluters are responsible for paying the costs of climate change.1 By contrast, I argue that we have reason to excuse individual agents morally for their contributions to climate change. This paper explores some of the possible constraints agents may face when they try to avoid harming the climate, constraints that might be acceptable reasons for excusing people’s contributions to climate change. Two (...) lines of arguments are discussed. The first concerns the soft internal constraint: that democratic citizens do not experience their individual failures as failures per se. In other words, they do not psychologically ‘feel’ they are doing anything wrong.2 The second argument concerns the soft external constraint: a number of studies have shown that many consumers report that while they are concerned about environmental issues, they struggle to translate their concern into green acts.3 Put differently, while individual citizens may think they are morally obliged to avoid harming the climate, they struggle to fulfill these obligations. I argue that these constraints do not constitute reasons for not blaming individual agents. Instead, individual agents can be morally excused for contributing to climate change because external constraints on agency make climate change a case of imperfect duty, that is, a duty that is hard to fulfill. (shrink)

When an individual’s action is only one among a large number of similar actions and does not seem to make any difference to the bad collective outcome, can it nonetheless be condemned by act utilitarianism? This question has currently regained interest with papers, e.g., by Shelly Kagan, Julia Nefsky, and Felix Pinkert. Christopher Morgan-Knapp and Charles Goodman answer the question in the affirmative for miniscule emissions in the context of climate change. They use expected utility analysis as Kagan (...) did in consumer ethics. The assumptions about the impact of emissions vary according to some underlying empirical scenarios, all of which are possible. Individual actions might be relevant in the sense of contributing to a mere linear accumulation of emissions; or they might be relevant by leading to an accumulation in the form of crossing thresholds, be it one or several, Finally, such actions might not be relevant at all. To give an answer that solves the problem and that is based solely on expected utility analysis is impossible. Therefore, the view of Morgan-Knapp and Goodman must be rejected. (shrink)

One manifestation of climate change is the increasingly severe extreme weather that causes injury, illness and death through heat stress, air pollution, infectious disease and other means. Leading health organisations around the world are responding to the related water and food shortages and volatility of energy and agriculture prices that threaten health and health economics. Environmental and climate ethics highlight the associated challenges to human rights and distributive justice but rarely address health or encompass bioethical methods or (...) analyses. Public health ethics and its broader umbrella, bioethics, remain relatively silent on climate change. Meanwhile global population growth creates more people who aspire to Western lifestyles and unrestrained socioeconomic growth. Fulfilling these aspirations generates more emissions; worsens climate change; and undermines virtues and values that engender appreciation of, and protections for, natural resources. Greater understanding of how virtues and values are evolving in different contexts, and the associated consequences, might nudge the individual and collective priorities that inform public policy toward embracing stewardship and responsibility for environmental resources necessary to health. Instead of neglecting climate change and related policy, public health ethics and bioethics should explore these issues; bring transparency to the tradeoffs that permit emissions to continue at current rates; and offer deeper understanding about what is at stake and what it means to live a good life in today's world. (shrink)

Machine learning methods have recently created high expectations in the climate modelling context in view of addressing climate change, but they are often considered as non-physics-based ‘black boxes’ that may not provide any understanding. However, in many ways, understanding seems indispensable to appropriately evaluate climate models and to build confidence in climate projections. Relying on two case studies, we compare how machine learning and standard statistical techniques affect our ability to understand the climate system. (...) For that purpose, we put five evaluative criteria of understanding to work: intelligibility, representational accuracy, empirical accuracy, coherence with background knowledge, and assessment of the domain of validity. We argue that the two families of methods are part of the same continuum where these various criteria of understanding come in degrees, and that therefore machine learning methods do not necessarily constitute a radical departure from standard statistical tools, as far as understanding is concerned. (shrink)