The ozone hole over the South Pole has shrunk by 700,000 square miles - a size similar to - compared to this time last year, providing hope to scientists who believe it is the elimination of ozone-depleting substances that is decreasing the hole. shared the announcement Wednesday, noting the hole reached an average area of 8.9 million square miles between September 7 and October 13, which is slightly smaller than the the 8.99 million square miles it was last year.Satellite observations determined area reached a single-day maximum of 10.2 million square miles on October 5, but is now back to the consistent depletion observed over the last few years.
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