IMPERIAL VALLEY, CALIFORNIA, AUGUST 2009: The All American Canal, the main water conduit from the Colorado River into the Imperial Dam, Imperial Valley, 6 August 2009. The Imperial Valley is a desert area which controversially uses three quarters of Californias allocated river water for agricultural purposes. The agricultural techniques have traditionally been flood and furrow which experts claim waste vast quanties of precious water. Imperial Valley farmers are looking at alternative techniques through which to conserve water supply. (Photo by Brent Stirton/Reportage for Getty Images.)
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