What about that most of the ice is so far north though? 2 degrees can't effect much above/below a certain latitude when it 40 below all winter long, and a steamy 10 degrees in the summer.

The easiest way for all of this to come to an end is for some nut job to let loose a virus that kills off 99.99% of the population. No more pollution, (except rotting corpses all that methane again), no need for large agri-business to feed the planet. No more companies dumping toxic waste into rivers. No war for at least a few years. No more anything. How far back do you suppose that would take the population to. 10,000 years? Just wondering, would that be a adequate solution? or a bit too extreme? Once you get over the everyone dying thing it would do an effective job.

Didn't that cows emiting methane thing come from the UN?