> I hate to break this to you, but the biggest obstacle to a human solution to this problem is ... humans. Or nature, if you prefer, in the guise of natural sel

> I hate to break this to you, but the biggest obstacle to a human solution to this problem is ... humans. Or nature, if you prefer, in the guise of natural selection. I'm not even sure that we are in disagreement. Reducing the birth rate would be one (admittedly important) prong in a multi-prong approach. But given current environmental realities, reducing the birthrate, even drastically, would not have the desired impact on current CO2 levels. Also, given humanity's energetic sexuality I do not think such a goal is realistic in practice, at least not enough to prevent apocalypse, and certainly not in the time frame required.