Dr. Hansen has announced that 2010 was the hottest year ever, beating 2005 by 0.01 degrees. If warming continues at that rate (0.02 degrees per decade) temperatures will rise by an unmanageable 0.18 degrees before the year 2100. That will surely cause the ice caps to melt and Manhattan to drown.
Of course, given that Hansen’s error bar is about +/- 0.4 degrees, it is just as likely that we will sink into an ice age. But regardless of what happens, it is America’s fault and we need the Chinese to sort it out.