2011 has been marked by extreme weather. In the U.S. alone, a record dozen disasters caused more than $1 billion in damage. This, and the release last month of a special UN report on extreme weather, was the backdrop for this Climate One panel featuring three leading climate scientists.

Chris Field, Director, Department of Global Ecology, Carnegie Institution for Science
Dave Friedberg, Founder & CEO, The Climate Corporation
Karen O'Brien, Professor of Sociology and Human Geography, University of Oslo
Michael Oppenheimer, Professor of Geosciences and International Affairs, Princeton