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Water: once an abundant necessity is now a scarce and complex commodity. Many efforts have been made to curb excessive water use in the West, but will taking shorter showers and ripping out lawns really make a difference? While recent drought conditions have diminished the once-mighty Colorado River--the source of the vast majority of the West's water, experts are now wondering whether the most severe shortages have been caused not by weather or consumer choices but by short-sighted policies and poor planning. Did we engineer our way into this crisis? Can we engineer our way out?