Director of Energy Research & Analysis at Union of Concerned Scientists

Atmospheric and Oceanic Sciences Professor at UCLA

Professor and Air Quality Extension Specialist at UC Davis

Affiliated Faculty, Center for Global Change & Sustainability at University of Utah

Principal TR Climate in New York, NY

Assistant Meat Scientist at UC Davis

Senior Research Scientist, Center for Climate Systems Research (CCSR) at Earth Institute, Columbia University

Professor & Director, M.A. in American Government at Georgetown University

Professor of American Government at Georgetown University

Associate Professor of Government at Dartmouth College

Associate Professor of Political Science and African American Studies at Northwestern University

Professor of Political Science, Iowa State University in Ames, IA

Professor in Political Science, Senior Fellow at the Hoover Institution at Stanford, Department of Political Science

Principal & Co-founder of RC Communications in Washington, DC

Astronomy at McDonald Observatory, University of Texas at Austin

Astronomer, Research Associate at McDonald Observatory, University of Texas at Austin

Professor, Arizona State University, School of Earth and Space Exploration in Phoenix, AZ

Member of the Board at Harvard Belfer Center for Science and International Affairs