San Jose Mercury News: A new study predicts that climate change will create devastating drought in this state and throughout the Southwest and continue to drop the levels of already low Lake Mead and Lake Powell, threatening the water supply for 2 million Nevadans. The prediction came as part of a study released Wednesday by the National Conference of State Legislatures and the Center for Integrative Environmental Research. The study, paid for in part by the Environmental Defense Fund, analyzed the …