Update on Ozone

Living on Earth
The World
David Baron examines the current debate over the state of the planet's thinning ozone layer. Although the hole in our atmosphere continues to grow, scientists say it's doing so more slowly these days, and the global phaseout of chlorofluorocarbons may have prevented a real disaster. Still, controversy remains about current damage, and most scientists agree that this is no time to stop worrying.
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