Conversations w/Great Minds Dr. Michael Mann - The Climate Wars P2

Dr. Michael Mann, Climate Scientist / Professor & Director-Penn State Earth System Science Center / Author-"Dire Predictions" and "The Hockey Stick and the Climate Wars" joins Thom Hartmann. Despite clear evidence of climate change occurring - the number of climate change deniers in this country is on the rise. Who is bankrolling the phony science behind the deniers - and why is there a war on scientific freedom underway in America?