The Western U.S. is just starting to recover after a prolonged, 16-year drought. A lack of water can force people to take a hard look at how they use it, and make big changes. That's what happened in southern Colorado, where farmers have tried a bold experiment: They're taxing themselves to boost conservation.
Colorado's San Luis Valley is a desperately dry stretch of land, about the same size as New Jersey.
Doug Messick manages potato farms for the valley's Spud Grower Farms. This fall, his fields were full of Russets — the kind you'd use for a loaded baked potato. Hanging from a metal arm above the plants, dozens of nozzles spray down perfect little water droplets.