Speaker: Dr. Steven E. Koonin, Chief Scientist, BP, plc. Abstract: Social, economic, and technical factors conspire to make it possible, if not probable, that atmospheric GHG concentrations will rise to imprudent levels. What steps should we be taking now to be prepared should the most dire of predicted climate change impacts come to pass? This is a Special Seminar in the Department of Earth, Atmospheric and Planetary Sciences.