The cover of the current issue of Rolling Stone features a gormless Justin Bieber sporting a white wife-beater “Hot, ready, legal”. Casual browsers at the newsstand could be forgiven for giving it a miss, but that would mean missing out on Bill McKibben's apocalyptic article about climate change.
Titled “Global warming’s terrifying new math”, it certainly lives up to its name. The most alarming claim is that we are already, in effect, three-quarters of the way to ensuring that average global temperatures rise by two degrees celsius, which is the upper limit of what scientists say is tolerable and just about the only thing that politicians in...