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In this July 21, 2020 file photo, Swiss photographer David Carlier takes photographs of the Swiss Aletsch glacier, the longest glacier in Europe, on the sideline of his photographic exhibition, in Fieschertal, Switzerland. Climate change is increasingly damaging the U.N.’s most cherished heritage sites, a leading conservation agency warned Wednesday Dec. 2, 2020, reporting that Australia’s Great Barrier Reef and dozens of other natural wonders are facing severe threats. (Photo by Laurent Gillieron/Keystone via AP Photo/File)
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