Office of Technology Assessment Congressional Board of the 101st Congress EDWARD M. KENNEDY, Massachusetts, Chairman CLARENCE E. MILLER, Ohio, Vice Chairman Senate House ERNEST F. HOLLINGS South Carolina MORRIS K. UDALL Arizona CLAIBORNE PELL Rhode Island GEORGE E. BROWN, JR. California TED STEVENS Alaska JOHN D. DINGELL ORRIN G. HATCH Utah DON SUNDQUIST Tennessee CHARLES E. GRASSLEY Iowa AMO HOUGHTON New York Michigan JOHN H. GIBBONS (Nonvoting) Advisory Council DAVID S. POTTER, Chairman General Motors Corp. (Ret.) CHASE N. PETERSON, Vice Chairman University of Utah CHARLES A. BOWSHER NEIL E. HARL Iowa State University JAMES C. HUNT University of Tennessee HENRY KOFFLER WILLIAM J. PERRY H&Q Technology Partners SALLY RIDE California Space Institute JOSEPH E. ROSS General Accounting Office University of Arizona Congressional Research Service MICHEL T. HALBOUTY JOSHUA LEDERBERG JOHN F.M. SIMS Usibelli Coal Mine, Inc. Michel T. Halbouty Energy Co. Rockefeller University Director JOHN H. GIBBONS The Technology Assessment Board approves the release of this report. The views expressed in this report are not necessarily those of the Board, OTA Advisory Council, or individual members thereof.