Thom Hartmann takes us through an hour with Michael Mann to understand more about climate change

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hom Hartman’s “The Big Picture” goes over the basics of what global warming is, what's causing it, and how we can stop it with climate scientist Michael Mann.

Dr Michael Mann.

Mann, the author of "The Hockey Stick: Dispatches from the Front Lines” and

 “Dire Predictions: Understanding Climate Change,” discusses the complexities of climate change.

Dr Michael E. Mann is a Distinguished Professor of Meteorology at America’s Penn State University and has joint appointments with the Department of Geosciences and the Earth and Environmental Systems Institute (EESI).

He is also director of the Penn State Earth System Science Center (ESSC).

He talks about the “State of earth’s climate” with Hartmann, an American radio host, author, former psychotherapist, entrepreneur, and progressive political commentator.