Steven Koonin On The Unsettled Science Of Climate

Dr. John Robson of CDN talks with Dr. Steven Koonin, theoretical physicist, Obama Administration climate official, author of "Unsettled: What Climate Science Tells Us, What It Doesn't, and Why It Matters" and co-author of the new U.S. Department of Energy report "A Critical Review of Impacts of Greenhouse Gas Emissions on the U.S. Climate".

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