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Aerial views of the Colorado River, Imperial Valley, 6 August 2009.
Yesterday, the federal government released the results of a three-year study on the Colorado River, a water source critical to Nevada, California and elsewhere.
The picture it paints is grim: demand is growing and supply is dwindling, and within 50 years the situation will be unsustainable.
Professor Jay Famiglietti, a hydrologist at UC Irvine and the director of the UC Center for Hydrolic Modeling joins the show to talk about the implications of the report.