Michael Oppenheimer is the Albert G. Milbank Professor of Geosciences and International Affairs at Princeton University. He is also the Director of the Program in Science, Technology and Environmental Policy (STEP) at Princeton’s Woodrow Wilson School. Oppenheimer, an atmospheric scientist, has an SB degree from MIT in chemistry and a PhD from the University of Chicago in chemical physics. He joined the Princeton faculty in 2002 after more than two decades with the Environmental Defense Fund, a non-governmental environmental organization, where he served as chief scientist and manager of the Climate and Air Program. Previously, he held the position of Atomic and Molecular Astrophysicist at the Harvard-Smithsonian Center for Astrophysics. Oppenheimer is a long-time participant in the Intergovernmental Panel on Climate Change (IPCC) which won the Nobel Peace Prize in 2007. Currently, he is a coordinating lead author on IPCC’s Fifth Assessment Report and is on the Core Writing Team for the Fifth Assessment’s Synthesis Report. Oppenheimer is coeditor of the journal Climatic Change and also editor of the journal’s Letters section. He serves on the US National Academies Board on Energy and Environmental Systems and the New York City Climate Change Panel, and is also a science advisor to the Environmental Defense Fund. His research focuses on the natural science and policy aspects of climate change and its impacts.