Reuters: Droughts from Australia to the U.S. Southwest, acidic ocean water and melting glaciers are signs that the pace of climate change is surpassing the worst-case scenarios scientists predicted in 2007, a U.N. report said on Thursday. Mountain glaciers in Asia are melting at a rate that could eventually threaten water supplies, irrigation or hydropower for 20 percent to 25 percent of the world’s population, the U.N. Environment Program report said. “We are headed to very serious …