United Press International: Policies that cut carbon emissions may be counterproductive if they strain dwindling water supplies — a problem that has already stemmed from some poorly crafted laws, experts said. Water and energy systems are intertwined throughout the world. Forty percent of the United States’ freshwater withdrawals are used to produce energy, and 18 percent of the nation’s electricity goes to treat, move, distribute and use water. How both of these resources are used is raising concerns …