Coral Bleaching

Michael Klare writes about climate "tipping points" which eventually threaten civilization if they can't be avoided. Mega-icebergs are calving into the ocean. And coral is dying all over the world due to an underwater heat wave. The evidence is out there, and keeps coming, if people want to see it. Are the Paris talks our last chance to change course and avert the worst?

Update (October 11):  Can breeding save coral?