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Ozone layer: Forbidden CFCs that date back to China, scientists say

Image rights Getty Images Caption Much of the CFC-11 gas was used for house insulation Researchers say they have tracked down the root causes of a mysterious rise in a dangerous, ozone-depleting chemical in recent times. CFC-11 was primarily used for housing insulation, but global production should be discontinued in 2010. Scientists, however, have noted a sharp slowdown in fatigue …

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