[marssaxman]

First, invent a time machine. Next, go back to the '60s and make a fortune on the stock market using your knowledge of the future. Finally, spend the '70s using your billions lobbying for something like the Paris treaty. Get it in place by the early '80s and you might be able to rest easy.

Short of that, there's little to recommend. We can't save the planet anymore, not as we know it; we've already pumped enough CO2 into the atmosphere that every ecosystem on earth will be permanently affected, no matter what we do from here.

Humanity will survive somehow. We do not appear to have any significant ability to deal with long-term, collective problems, but we're pretty good at engineering our way out of short-term crises. The worse the immediate problems become, the more attention they will get, and the more willing people will be to divert resources to their solutions.

I try to avoid worrying about things I can't change, and the fate of humanity is certainly one of them.