A Red Alert Over The Ozone
A few months ago, Eileen Claussen thought that the earth's protec tive ozone layer--and perhaps the globe's inhabitants--had been saved from a grim fate. After all, the Environmental Protection Agency's ozone chief reasoned, an international accord reached last summer would speed the elimination of chemicals that destroy the ozone shield and let excess deadly ultraviolet (UV) light reach the earth. And in the 1990 Clean Air Act, Congress committed the U. S. to start phasing out the chemicals, known as chlorofluorocarbons (CFCs), even faster. "We thought we had done it," Clausen says.
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