Climate change is never the issue. The issue is always the socialist revolution. To eliminate capitalism and replace it with socialism. Of course, they pick the very economic system that has never worked anywhere in the history of the world, ever. Socialism has always failed. But these radical leftists think that if they can have just one more crack at it, that it will be successful.
For a discussion climate science, listen to this, from 2009 (part 1):
A True Inquiry into Climate and Weather (1/2) -
http://itsrainmakingtime.com/robert-felix-joe-daleo-dr-tim-ball-true-inquiry-climate-and-weather/
warning: the podcast is 3 hours in length.