the NRC Board on Earth Sciences and Resources. He was the first director of government affairs for the American Geological Institute, a federation of 32 national scientific and professional societies in the geosciences. He was a congressional science fellow on the staff of the U.S. Senate Judiciary Committee, where he worked on legislation to ensure that federal laws keep pace with changes in technology. As a Carnegie fellow at the Geophysical Laboratory of the Carnegie Institution of Washington, he conducted research in petrology, geochemistry, and economic geology. He holds a Ph.D. in geology from Harvard University; a B.A. in philosophy, politics, and economics from Oxford University, where he was a Marshall scholar; and a B.S. and M.S. in geology and geophysics from Yale University.

GREGORY H.SYMMES, study director (since August, 1999), is associate executive director of the NRC Commission on Geosciences, Environment, and Resources. Since joining the NRC staff in 1995, he has been responsible for overseeing the review and publication of reports produced under the commission. He also directed a study for the NRC Board on Radioactive Waste Management (BRWM) that led to the report, Peer Review in Environmental Technology Development Programs: The Department of Energy's Office of Science and Technology, and is currently directing a BRWM study that will lead to the report, Technologies for Environmental Management: The Department of Energy 's Office of Science and Technology. Prior to joining the NRC, he served as a research assistant professor and postdoctoral associate in the Department of Earth and Space Sciences at the State University of Stony Brook. He received his Ph.D. in geology from the Johns Hopkins University, where he studied fluid-rock interaction and mineral-fluid-melt phase equilibria in the deep crust, and his B.A. summa cum laude in geology from Amherst College

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