An excavator is used to dig earth at the dam site of Kishanganga power project in Gurez, 160 kms (99 miles) north of Srinagar June 21, 2012. A U.S. intelligence report in February warned fresh water supplies are unlikely to keep up with global demand by 2040, increasing political instability, hobbling economic growth and endangering world food markets. A "water war" is unlikely in the next decade, it said, but beyond that rising demand and scarcities due to climate change and poor management will increase the risk of conflict. That threat is possibly nowhere more apparent than in South Asia, home to a fifth of humanity and rife with historical tensions, mistrust and regional rivalries. Picture taken June 21, 2012. To match Feature WATER-SOUTHASIA.