Who cares? All life will have perished due to global warming by then.
You're behind the times. Latest indications are we in for a new ice age. Not surprising, since in a since we've been overdue for some time now, based on historical patterns. Good news is the ice will clear out the worst pockets of Blue Zone liberalism, all except southern California, parts of Florida and of course Austin Texas. However the Austinites will be overwhelmed by Red Zoners fleeing the ice sheets. Prepare to be hungry, maybe for a few millinia.