Photo: U.S. Southwest Drought Could Be Start of New Dust Bowl

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A 100-foot-tall (30-meter-tall) "bathtub ring" of bleached rock shows in stark contrast to the red sandstone surrounding a Colorado River reservoir near Page, Arizona, on March 26, 2007.

The unprecedented drought now gripping the U.S. Southwest could be the beginning of long-term climate changes that will make the region as dry as the Dust Bowl conditions of the 1930s, a new study says.

Photograph by David McNew/Getty Images

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