The thing about all the doom and gloom is that I don't think anyone is seriously expecting the end of humanity. We're not talking extinction, at least not yet and probably not for a very long time. We're talking really hard times for people, though. Some previously habitable areas becoming uninhabitable, reduction in how much food we can produce and therefore how many people can be fed, things like that.

There's this idea that we're making Earth unlivable but, short of large-scale nuclear war, I don't think we're really capable of that. And humans are smart, when they have to be, and very adaptable. As a species, we'll survive. But how many of us, and in what conditions, is very much up in the air.