rofl It won't be the end of the world, the planet will be just fine, it has remarkable powers of recuperation and regeneration. It won't even be the end humanity, we are pretty hard to kill. But it sure as hell is going to fuck things up pretty good. Exactly how is the question, no one is totally sure. But we are going to see places where humans can survive turn into places they can't, not without living in an airconditioned bubble. We are seeing problems already in these early days of the warming, already have the coral reefs are dead just from rising ocean temps. And the effects are just beginning to show up, imagine what they will be by 2100. You may not care because you'll be dead, but humanity will still be around and they will be pissing on the denier's graves for being stupid.