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)

Cap-and-trade systems for greenhouse gas emissions are an important part of the climate change policies of the EU, Japan, New Zealand, among others, as well as China and Australia. However, concerns have been raised on a variety of ethical grounds about the use of markets to reduce emissions. For example, some people worry that emissions trading allows the wealthy to evade their responsibilities. Others are concerned that it puts a price on the natural environment. Concerns have also been raised about (...) the distributional justice of emissions trading. Finally, some commentators have questioned the actual effectiveness of emissions trading in reducing emissions. This paper considers these three categories of objections – ethics, justice and effectiveness – through the lens of moral philosophy and economics. It is concluded that only the objections based on distributional justice can be sustained. This points to reform of the carbon market system, rather than its elimination. (shrink)

Recent years have witnessed a revival of scientific, political and philosophical discourse concerning the notion of ecological limits. This article provides a conceptual overview of descriptive ecological limit claims—i.e. claims that there are real, biophysical limits—and reviews work in political and social philosophy in which such claims form the basis of proposals for normative limits. The latter are classified in terms of three broad types of normative theorising: distributive justice, institutional/legal reform, and the good life. Within these three categories, the (...) article reviews normative proposals for limits on both aggregate‐level and individual‐level ecological exploitation. It also considers the relevance of political and ideological facts to the normative analysis of ecological limits, raising methodological questions about how normative theorists should respond to a world facing escalating ecological challenges. (shrink)

However far we are from either in practice, basic global and intergenerational justice, including climate change mitigation, are taken to be theoretically compatible. If population grows as predicted, this could cease to be the case. This paper asks whether that tragic legacy can now be averted without hard or even tragic choices on population policy. Current generations must navigate between: a high-stakes gamble on undeveloped technology; violating human rights; demanding unbearable sacrifices of the already badly off; institutional unfairness across adults; (...) institutional unfairness across children; failing to protect children’s basic interests; and threatening the autonomy of the family. We are not yet forced to choose between bequeathing a tragic choice and making one, by adopting basically unjust measures. However, even the remaining options present a morally hard choice. The fact we face it is yet another damning indictment on the combined actions and collective failures of the global elite. (shrink)