Yale Environment 360: Batten down the hatches; fill the grain stores; raise the flood defenses. We cannot know exactly what is coming, but it will probably be nasty, the latest report from the UNs Intergovernmental Panel on Climate Change (IPCC) will warn next week. Global warming will cause wars, displace millions of people, and do trillion-dollar damage to the global economy. But careful readers will note a new tone to its discussion of these issues that is markedly different from past efforts. It is more humble about...