Global heating will push billions outside ‘human climate niche’

The world is currently on track for 2.7 degrees of warming. Of all the consequences this is still one of the most mind-boggling ones — and yet surprisingly little talked about: It would mean that 2 billion people — a quarter of the entire population of the planet — will soon experience average annual temperatures above 29 degrees celsius, a level at which very few communities have lived in the past. That means a lot of suffering, and migration like we’ve never seen before.