In this week's Spectator Books, I’m talking to the American journalist David Wallace-Wells about his new book The Uninhabitable Earth: A Story of the Future. In it, he uses the best available scientific projections to underpin a picture of what the world would look like if it heats up by four degrees or more. Not pretty, is the conclusion he comes to. But what’s he trying to achieve with this book? Why, in his view, do we not take climate change seriously enough? And is this Project Fear — or Project Damn Well Pay Attention?