In response to doubts about the causes and potential extent of global climate change, a panel of four climate experts today will review the current state of climate science and discuss observed and predicted changes. The special forum will include conclusions from recent national and international climate change reports.Charles Kolb, Ph.D. (symposium organizer), is with Aerodyne Research in Billerica, Mass.Michael McElroy, Ph.D., is with Harvard UniversityJames McCarthy, Ph.D., is with Harvard UniversityJohn Christy, Ph.D., is with the University of Alabama, HuntsvilleRobert Socolow, Ph.D., is with Princeton University.