Comment It's self-regulating (Score 1) 320
We make things worse, more of us die, the issue is blunted. Make it bad enough, civilization fails, lots of people die, and the surviving population will be environmentally worse individually but few enough in number it won't be a major climate factor.
Then the Sun expands, bakes the planet sterile, and possibly burns it into a puff of plasma.
Long term it's a losing game, but short term we could play to win if we didn't lack the required strategic thinking as a species.