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[Uniquement en anglais] One of the largest restoration projects in the history of the United States is underway at Olympic National Park World Heritage site in Washington. Begun in September 2010, the removal of the Elwha and Glines Canyon dams on the Elwha River will result in salmon populations swelling from 3,000 to more than 300,000 as all five species of Pacific ...
Lecture [Uniquement en anglais] 1 min.
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