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        Lake Mead At Historic Low Levels Amid Drought In West | Human Impact on the Physical Environment | Geography

        OVERTON, NV - MAY 12: Dry-cracked earth is seen at the Overton Wildlife Management Area on May 12, 2015 in Overton, Nevada. As severe drought grips parts of the Western United States, Lake Mead, which was once the largest reservoir in the nation, has seen its surface elevation drop below 1,080 feet above sea level, its lowest level since the construction of the Hoover Dam in the 1930s.

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