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ROBERT A. FROSCH is vice president at General Motors Research Laboratories in Warren, Michigan. He was Assistant Secretary of the Navy for Research and Development from 1966 to 1973. From 1973 to 1975 he was assistant executive director of the United Nations Environment Programme. He was director of the National Aeronautics and Space Administration from 1977 to 1981. He is a member of the National Academy of Engineering.

THOMAS H. LEE is professor emeritus in the Department of Electrical Engineering and Computer Science at Massachusetts Institute of Technology in Cambridge, Massachusetts. He worked at General Electric for 32 years, and from 1978 to 1980 was staff executive and chief technologist. From 1980 to 1984 he directed the Electric Power Systems Engineering Laboratory at Massachusetts Institute of Technology, and was director of the International Institute for Applied Systems Analysis from 1984 to 1987. He is a member of the National Academy of Engineering.

JESSICA TUCHMAN MATHEWS is vice president at the World Resources Institute in Washington, D.C. A molecular biologist and policy analyst, she was a professional staff to the United States Congress House Interior Committee from 1974 to 1975. From 1977 to 1979, she was director of the Office for Global Issues at the National Security Council.

WILLIAM D. NORDHAUS is professor of economics at Yale University in New Haven, Connecticut. He was a member of the Council of Economic Advisors from 1977 to 1979. From 1986 to 1988 he was provost at Yale University.

GORDON H. ORIANS is professor of zoology and was formerly director of the Institute for Environmental Studies at the University of Washington in Seattle, Washington. He specializes in evolution of vertebrate species. He is a member of the National Academy of Sciences.

STEPHEN H. SCHNEIDER is head of Interdisciplinary Climate Systems at the National Center for Atmospheric Research in Boulder, Colorado. He is an expert on global climate change models, and is editor of Climate Change.

MAURICE STRONG served on the Panel until February, 1990 when he resigned due to his commitment to serve as secretary general to the 1992 United Nations Conference on Environment and Development. He was director-general of the External Aid Office of the Canadian government, and Undersecretary General of the United Nations with responsibility for environmental affairs. He was chief executive of the 1972 United Nations Conference on the Human Environment.