A Global Warming Achievement

It has caused Peter Singer to renounce his own philosophy. Sort of.
Climate change is a challenge to utilitarianism on at least two accounts. First, the problem of reducing the carbon output of humanity is tied to the problem of rising human populations. The more people there are, the greater becomes the difficulty of tackling climate change. This fact sits uneasily for a preference utilitarian, who would be inclined to argue that the existence of more and more sentient beings enjoying their lives – realising their preferences – is a good thing. As Singer puts it in the new edition of his book, Practical Ethics: "I have found myself unable to maintain with any confidence that the position I took in the previous edition – based solely on preference utilitarianism – offers a satisfactory answer to these quandaries."
Whew! At least he still hates people!