I see a lot of doom and gloom in the comments here. Correct me if I’m wrong, but is not the main concern being that sea levels will rise and flood costal cities? Plus some parts of the world will be too hot to comfortably live? Human beings are remarkably creative when they need to be. Right now most are overweight watching TV and worried about stupid unimportant things. But if the need arose to build new towns/cities in higher and cooler locations, we have the man power. Literally BILLIONS of humans, some smart ones to plan it all, and the rest to build it. I don’t see an “end of humanity” or “don’t have kids” as being reasonable. Humanity will adapt. Please correct me if I’m missing something here.