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Energy Companies Drill for Oil in the Niobrara Formation in Northeastern Colorado

A water storage area that includes three 1.5 million gallon tanks operates at the Niobrara oil shale formation in Weld County, North eastern Colorado on May 30, 2012. The flame is natural gas runoff after Noble Energy finished drilling on the site. Gas and oil companies are using large amounts of water to obtain shale oil and gas in a process called hydraulic fracturing or fracking. UPI/Gary C. Caskey

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