Ideal carbon tax policy is internationally coordinated, fully internalizes externalities, redistributes revenues to those harmed, and is politically acceptable, generating predictable market signals. Since nonideal circumstances rarely allow all these conditions to be met, moral issues arise. This paper surveys some of the work in moral philosophy responding to several of these issues. First, it discusses the moral drivers for estimates of the social cost of carbon. Second, it explains how national self-interest can block climate action and suggests international policies—carbon (...) border tax adjustments and carbon clubs—that can help address these concerns. Third, it introduces some of the social science literature about the political acceptability of carbon taxes before addressing a couple common public concerns about carbon taxes. Finally, it introduces four carbon revenue usage options, arguing that redistributive and climate compensation measures are most morally justified. [Open access]. (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)

This chapter introduces several distinctions relevant to what is called the “discounting problem”, since the issue is how (future) costs and benefits are discounted to make them comparable in present terms. The author defends the claim that there are good reasons to adopt Ramsey-style discounting in the context of climate change: the Ramsey rule is robust, flexible, and well-understood. An important distinction involved in discounting—“descriptivism” and “prescriptivism”—is discussed. It is argued that, even if we adopt prescriptivism, and accept that this (...) means there is need for moral experts in parameter assignments, there is a significant issue. The type of moral expertise required for the discounting problem will not involve knowledge of moral theory—thus making moral philosophy unhelpful in terms of making particular parameter assignments, despite these being substantive moral judgments. (shrink)

Journal of Social Philosophy, EarlyView.

Egalitarian theories assess when and why distributive inequalities are objectionable. How should egalitarians assess inequalities between generations? One egalitarian theory is (telic) distributive egalitarianism: other things being equal, equal distributions of some good are intrinsically better than unequal distributions. I first argue that distributive egalitarianism produces counterintuitive judgements when applied across generations and that attempts to discount or exclude intergenerational inequalities do not work. This being so, intergenerational comparisons also undercut the intragenerational judgements that made distributive egalitarianism intuitive in the (...) first place. I then argue that egalitarians should shed distributive egalitarianism: relational and instrumental arguments against inequality likely suffice to capture egalitarian concerns – including across generations – without encountering the problems produced by distributive egalitarianism. (shrink)

Utility discounting in intertemporal economic modelling has been viewed as problematic, both for descriptive and normative reasons. However, positive utility discount rates can be defended normatively; in particular, it is rational for future utility to be discounted to take into account model-independent outcomes when decision-making under risk. The resultant values will tend to be smaller than descriptive rates under most probability assignments. This also allows us to address some objections that intertemporal considerations will be overdemanding. A principle for utility discount (...) rates is suggested which is rooted in probability discounting. Utility discounting is defended against objections from Parfit (1984) and Broome (2005); Broome (2012). A sample utility discount rate is estimated. [Open access]. (shrink)

While the foundations of climate science and ethics are well established, fine-grained climate predictions, as well as policy-decisions, are beset with uncertainties. This chapter maps climate uncertainties and classifies them as to their ground, extent and location. A typology of uncertainty is presented, centered along the axes of scientific and moral uncertainty. This typology is illustrated with paradigmatic examples of uncertainty in climate science, climate ethics and climate economics. Subsequently, the chapter discusses the IPCC’s preferred way of representing uncertainties and (...) evaluates its strengths and weaknesses from a risk management perspective. Three general strategies for decision-makers to cope with climate uncertainty are outlined, the usefulness of which largely depends on whether or not decision-makers find themselves in a context of deep uncertainty. The chapter concludes by offering two recommendations to ease the work of policymakers, faced with the various uncertainties engrained in climate discourse. (shrink)

First, with respect to our personal relationship to fossil fuels, this chapter introduces arguments about whether we should or even can address our own usage of fossil fuels. This involves determining whether offsetting emissions is morally required and practically possible. Second, with respect to our relationship with fossil fuels at the national level, it discusses forms of local resistance, especially divestment and pipeline protesting. Finally, with respect to our relationship with fossil fuels at the international level, it considers two types (...) of policy. On the one hand, some have argued that we should stop most trade in oil, on the basis that most oil that is traded is not subject to the control of citizens. On the other hand, some have argued that we should price the costs of fossil fuels so that there are market incentives to avoid digging them out of the ground. (shrink)

The focus of this chapter is public policy and consequentialism, especially issues that arise in connection with the environment – i.e. the natural world, including non-human animals. We integrate some of the existing literature on environmental economics, welfare economics, and policy with the literature on environmental values and philosophy. The emphasis on environmental policy is motivated by the fact that it is arguably the most philosophically interesting and challenging application of consequentialism to policy, as it includes all the challenges of (...) valuing the distribution of human wealth and power, and has the further challenge of putting these consequences on the same scale as consequences for human health, non-human animals, and nature. We suggest that standard methods of (economic) policy analysis provide a good approximation of correct welfarist analysis, except that they must be supplemented with methods for valuing animal wellbeing and tradeoffs with human wellbeing. We then provide the needed methods. (shrink)

The Southern Journal of Philosophy, Volume 59, Issue 3, Page 270-308, September 2021.

[Dissertation summary] When performing intertemporal cost-benefit analyses of policies, both in terms of climate change and other long-term problems, the discounting problem becomes critical. The question is how to weight intertemporal costs and benefits to generate present value equivalents. This thesis argues that those best placed to answer the discounting problem are domain experts, not moral philosophers or the public at large. It does this by arguing that the discounting problem is a special case of an interesting class of problems, (...) those which are both what I call morally complex and quantitative. [Open access]. (shrink)

In this article I hold that utilitarians are wrong to want to disaggregate climate- induced harm, whether in terms of chaotic or linear causality. This is not because individual emissions do not count, in probabilistic terms, for risk projections of overall climate dam- age, rather because individual emissions only contribute to increasing atmospheric CO2 concentration if the anthropogenic flow of CO2 exceeds the amount of CO2 that can be naturally taken up by the biosphere, over a given time segment. I (...) therefore maintain that individual climate duties consist of reforming the social and technological structures that make each individual emission part of a collective phenomenon, global warming, which leads to an enormous global disutility, climate change. In the final part of the article, I ar- gue that utilitarian ethics would have much more to say if, instead of focusing on the dis- aggregation of climate-induced harm, it addressed the key issues of the energy transition, i.e. carbon pricing, research and development in green technologies and climate finance. (shrink)

[Newspaper opinion] strengthening carbon pricing during COVID-19 is the best time to do so for both consumers and for governments.

In this article I maintain that a progressive and leftist carbon tax should be revenue-neutral through a dual policy package: first, it should use some revenues to offset price increases for the poor and middle classes; second, it should use the remaining part of revenues to lower taxes on labour income (both employed and self-employed income) for those below a middle-income threshold. I will briefly examine three reasons why such a revenue-neutral and dual-package carbon tax (RN-DP-CT) could (and should) become (...) central in the political agenda of the European Left – even though much of what I will suggest can reasonably hold also with respect to other countries. First, the tax wage on labour in the euro area is one of the highest in the world. Second, the revenue-neutral and dual policy package carbon tax will tax more capital that yields income without a proportional increase in labour demand, rather than capital that creates new job opportunities. Third, we live in societies that are highly unequal, hence I see no moral reason why a carbon tax reform should not aim, among other things, to take wealth away from the richest. (shrink)

Pigovian policy is developed in economic theory as an efficient resolution to externality problems. The use of this type of policy to resolve real-world externality problems, including climate change in the form of carbon taxes, assumes that the Pigovian policy result derived in theory holds in the real world. By examining the bridging conditions from theory to the real world, I argue that this assumption holds only in an ambiguously defined subset of externalities. It is thus unclear when Pigovian policy (...) could be coherently applied, which is problematic given its widespread use in critical policy contexts. (shrink)

Climate justice demands polluters to take responsibility for both present and future harm caused by past GHG emissions and for future harm caused by future GHG emissions. One problem with this is double climate taxation: people living in historical polluting countries must both shoulder the burden of an effective and inclusive climate transition and repay the climate debt incurred by their predecessors. Although double climate taxation might be defensible on normative grounds, it risks making climate justice politically infeasible. I therefore (...) maintain that global climate justice should focus on future, rather than past, climate harms. The forward-looking polluter pays principle (FL-PPP) can ensure both a cost-effective climate transition and a fair distribution of the climate burden, provided it is applied as follows: i) each country must introduce a carbon price calibrated to the global social cost of carbon; ii) each country must transfer part of carbon revenues collected at the country level to an international fund; iii) global carbon revenues must be redistributed on the basis of the country-level social cost of carbon. The FL-PPP burden can be made more progressive, moreover, if the formula for allocating global carbon revenues is adjusted through two coefficients, one consumption-based and one priority-sensitive. (shrink)

John Broome and Duncan Foley have proposed an ingenious way to transfer benefits backwards in time, from people who are not here yet to people who will not be here in the future. Present people can crowd out conventional, and often brown, investments by issuing global climate bonds (GCBs). The debate about GCBs has focused on whether it is justified to use this financial instrument to allow future people to buy off present people for climate mitigation. In this article, I (...) ask whether it is fair to use GCBs to share the cost of a global carbon price between present and future people. My answer is that it depends on the approach used to calculate the carbon price and, of course, on the normative claims underlying the different approaches. Specifically, I argue that the internalisation principle underlying the cost-benefit approach does not justify intergenerational cost-shifting if, as in most cases, the social cost of carbon is determined using, inter alia, a social discount rate. Instead, the conservative justifications underlying a cost-effective carbon price consistent with the Paris mitigation target allow for intergenerational cost-shifting, but only to the extent of the difference (if any) between the Paris-consistent and the Pareto-efficient carbon price. (shrink)

In this paper I examine the relation between Social Cost of Carbon (SCC) estimates, abatement cost analyses, and individual climate duties. I first highlight the stakes that SCC and abatement cost estimates potentially have for the content of individual duties to either pay the full or fair cost of their carbon emissions, or offset the volume of their emissions. I survey four methodological options (a minimalist approach, a precautionary approach, an averaging approach, and what I call a ‘sufficiency-bounded’ precautionary approach) (...) for conceptualizing the terrain of individual duties in light of SCC and abatement cost estimates that are both contentious and evolving. (shrink)

Written both for general readers and college students, Dialogues on Climate Justice provides an engaging philosophical introduction to climate justice, and should be of interest to anyone wanting to think seriously about the climate crisis. -/- The story follows the life and conversations of Hope, a fictional protagonist whose life is shaped by a terrifyingly real problem: climate change. From the election of Donald Trump in 2016 until the 2060s, the book documents Hope’s discussions with a diverse cast of characters. (...) As she ages, her conversations move from establishing the nature of the problem, to engaging with climate skepticism, to exploring her own climate responsibilities, through managing contentious international negotiations, to considering big technological fixes, and finally, as an older woman, to reflecting with her granddaughter on what one generation owes another. Following a philosophical tradition established by Plato more than two thousand years ago, these dialogues are not only philosophically substantive and carefully argued, but also distinctly human. The differing perspectives on display mirror those involved in real-world climate dialogues going on today. (shrink)

[Book Review] Joseph Heath sometimes plays the role of a gadfly in climate and environmental ethics. He often defends conventional, economics-focused claims which rub many philosophers the wrong way—claims that are at the heart of issues raised in these pages, claims such as that discounting is justifiable, growth is good, or cost-benefit analysis is appropriate in liberal democracies. I think we can all agree that sophisticated defences of conventional positions play an important part in the ecosystem. For philosophers, a gadfly (...) can challenge entrenched conceptions. If we agree that these goals are worthwhile, then this book serves as a useful summary and synthesis of the ways Heath has ably defended conventional claims about climate policy. (shrink)

Joseph Heath sometimes plays the role of a gadfly in climate and environmental ethics. He often defends conventional, economics-focused claims which rub many philosophers the wrong way—claims that are at the heart of issues raised in these pages, claims such as that discounting is justifiable, growth is good, or cost-benefit analysis is appropriate in liberal democracies. I think we can all agree that sophisticated defences of conventional positions play an important part in the ecosystem. For philosophers, a gadfly can challenge (...) entrenched conceptions. If we agree that these goals are worthwhile, then this book serves as a useful summary and synthesis of the ways Heath has ably defended conventional claims about climate policy. (shrink)