NY Times: When the tap across from her mud-walled home dried up in September, Celia Cruz stopped making soups and scaled back washing for her family of five. She began daily pilgrimages to better-off neighborhoods, hoping to find water there. Though she has lived here for a decade and her husband, a construction worker, makes a decent wage, money cannot buy water. “I’m thinking of moving back to the countryside; what else can I do?” said Ms. Cruz, 33, wearing traditional braids and a long tiered skirt as she surveyed a courtyard dotted with piglets, bags of potatoes and an ancient red Datsun. “Two years ago this was never a problem. But if there’s not water, you can’t live.” The glaciers that have long provided water and electricity to this part of Bolivia are melting and disappearing, victims of global warming , most scientists say. If the water problems are not solved, El Alto, a poor sister city of La Paz, could perhaps be the first large urban casualty of climate change. A Wo...