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Southern ozone hole slightly smaller this year

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WASHINGTON (AP) — Scientists say warm upper air this September and October helped shrink the man-made ozone hole near the South Pole ever so slightly. The hole is an area in the atmosphere with low ozone concentrations. It is normally is at its biggest this time of year. NASA says on average it covered 8.1 million square miles this season. That's 6 percent smaller than the average since 1990....

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