[ScottBurson]

> Humanity [...] will survive increased CO2 levels.

I don't know that we can take this as a given. It would have been easier two or three hundred years ago; now we have industrial civilization and 7.3 billion people, the combination giving us an unprecedented ability to do damage to the ecosphere. I can imagine a scenario in which climate change leads to political unrest which leads to wars — we may already be seeing some of this, and it could get a lot worse — that eventually spirals out of control into thermonuclear war. Unlikely? I sure hope so! But I don't think we can rule it out completely.

Sure, the cockroaches will survive. But that's not much consolation.

I think we need to figure out a way for all of humanity to work together on this problem. If we fail to do that pretty soon, I don't think it will bode well for our doing it in the future either. Continued denial and fractiousness will make the nightmare scenario more likely.