The sun sets over melting sea ice on Peel Sound along the Northwest Passage in the Canadian Arctic Archipelago, Sunday, July 23, 2017. Because of global warming, more sea ice is being lost each summer than is being replenished in winters. Although sea ice is likely to continue forming each winter it may be restricted to even higher latitudes. Less sea ice coverage also means that less sunlight will be reflected off the surface of the ocean in a process known as the albedo effect. The oceans will absorb more heat, further fueling global warming. (AP Photo/David Goldman)
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