Correct. But the thing to remember is that we're going up by 2-3 PPM/year, and the arctic permafrost is almost certain to release its methane long before we ge

Correct. But the thing to remember is that we're going up by 2-3 PPM/year, and the arctic permafrost is almost certain to release its methane long before we get to 1200. Civilization is all but certain to collapse after that.