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Thursday, June 30, 2016

Surprising sign for Earth's ozone layer The ozone hole over the Antarctic has shrunk by 1.5 million square miles since 2000, a study shows.'Healing ... has begun' »

Surprising sign for Earth's ozone layer The ozone hole over the Antarctic has shrunk by 1.5 million square miles since 2000, a study shows.'Healing ... has begun' »

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