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Only 1 in 3 of the world's longest rivers are still free-flowing: study

A first-of-its-kind analysis of Earth’s longest rivers found that they have been severely degraded by human activities and suggests ways for countries to maintain and restore rivers around the world.

Just one-third of the planet’s 242 longest rivers still flow uninterrupted along their entire length, most of them located in remote regions of the Arctic, the Amazon Basin, and the Congo Basin, according to a study to be published in Nature tomorrow. “In densely populated areas only few very long rivers remain free-flowing, such as the Irrawaddy and Salween,” the study states.

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