Founder, Health in Harmony

Founder, kiva.org, renewables.org

Co-Director, Energy Justice Lab, University of Pennsylvania

Co-Executive Director, Clean Energy Works

Vice President, Office of the Chief Scientist, Environmental Defense Fund

Associate Professor of Environmental Studies, New York University

Senior Climate Scientist, Spark Climate Solutions

Co-Founder and CEO, Culdesac

Director of NYU's Rudin Center for Transportation Policy and Management

Senior Attorney, Natural Resources Defense Council

Climate Justice Fellow, Sabin Center for Climate Change Law

Senior Director, Climate Policy, National Audubon Society