[paulolc]

Yep, that's how evolution works. It's natural selection working. We'll keep forking the planet until it becomes too costly to do it. Anyway, the will to survive while profiting from it, will become a pretty good incentive to come up with some good alternatives either here on Earth or somewhere else. Otherwise we'll hit the Big Filter. OTOH, it's true, it's not looking good for us in the long run. It may well be that the water already started to boil and we are the frog.