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Scientists see the Southwest as first major U.S. climate change victim

New York Times: A 60-year drought that scorched the Southwest during the 12th century may be a harbinger of things to come as greenhouse gases warm the Earth, according to research published yesterday in the Proceedings of the National Academy of Sciences. The study's authors used tree rings to reconstruct a portrait of droughts that struck the Southwest over a 1,200-year period stretching back to 900 A.D. They believe that understanding the droughts of the past could help water managers plan for future dry periods...