"In the future, keeping your gas tank full could make disputes over water in the American West a lot worse. It's because energy companies hope to develop the oil shale industry. Getting oil from shale requires lots of water, and the richest oil shale deposits happen to be in the dry state of Colorado." The Environment Report's Shawn Allee headed there to see why a fight over water and oil could be in the works. Aired June 8, 2009.