Emeriti

John Harte

Professor of the Graduate School
John Harte is a physicist turned ecologist. His research interests span ecological field research, the theory of complex systems, and policy analysis.

John P. Holdren

Professor Emeritus
John Holdren is Research Professor in Harvard University’s Kennedy School of Government and Co-Director of the Science, Technology, and Public Policy Program in the School’s Belfer Center for Science and International Affairs. From 2009 to 2017, Dr. Holdren was President Obama’s Science Advisor and Director of the White House Office of Science and Technology Policy (OSTP).

Daniel M. Kammen

Professor Emeritus
Daniel Kammen is an expert in renewable energy, climate policy, and sustainable development. Kammen joined Johns Hopkins University as a Bloomberg Distinguished Professor in 2025 from the University of California, Berkeley.

Catherine Koshland

Professor Emeritus
Dr. Koshland’s research is at the intersection of energy, air pollution and environmental (human) health emphasizing mechanistic approaches as well as a systems perspective.

Richard Norgaard

Professor Emeritus
Among the founders of the field of ecological economics, Dr. Norgaard's recent research addresses how environmental problems challenge scientific understanding and the policy process, how ecologists and economists understand systems differently, and how globalization affects environmental governance.