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This December 17, 2019 file aerial photo shows Arizona's Grand Canyon. A leading conservation agency is warning that climate change is damaging the U.N.' most cherished heritage sites. 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 Charlie Riedel/AP Photo/File)
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