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The global environmental warming issue has been catapulted to the forefront of media attention as a result of the drought of 1988 and extremely warm temperatures. NASA scientist James Hansen testified last year that the warming trend has begun and that part of the temperature rise is due to gases such as carbon dioxide, methane, and chlorofluro-carbons (CFCs) being released into the atmosphere by human activity.

In response to recent scientific speculation on the issue, the National Academy of Sciences, Washington, D.C., hosted the symposium Global Environmental Change April 24 as part of their annual meeting. Speakers included Bert Bolin, University of Stockholm; Robert White, National Academy of Engineering; Stephen Schneider, National Center for Atmospheric Research; and Peter Raven, Missouri Botanical Garden. Moderator was Russell Train, World Wildlife Fund.