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Rising temperatures load the dice for megadrought risk

As the American Southwest grows hotter, the risk of severe, long-lasting megadroughts rises, passing 90 percent likelihood by the end of the century if greenhouse gas emissions continue at their current pace, a new study says. If we aggressively reduce emissions, however, we can cut that risk substantially, the authors write. The findings from scientists at Columbia University's Lamont-Doherty Earth Observatory, Cornell University and NASA provide new insights into the role temperature plays in megadrought risk and how our choices today can affect water resources in the future.
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