Damming, dredging, pollution, water diversion and other human-related activities pose more of an immediate threat to the world's rivers than climate change, scientists say. "Our main point is that we worried that the understandable concern about dangerous climate change -- which is real and warranted -- has meant that in some cases the main causes of dangerous environmental change are sometimes overlooked," says study co-author Stephen Darby, physical geography professor at the University of Southampton.
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