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Limnologi (sötvatten)
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The Great Lakes-containing one-fifth of the standing freshwater on earth, covering some 94,250 square miles with a combined 10,210 miles of shoreline-have suffered greatly from …
The Great Lakes—containing one-fifth of the standing freshwater on earth, covering some 94,250 square miles with a combined 10,210 miles of shoreline—have suffered greatly from …