WYO FRACKING

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An oil well pump jack runs on the plains near Douglas, Wyo., Thursday, November 22, 2013. The state will require pre-drilling testing of groundwater at sites where hydraulic fracturing, also known as "fracking" is used. (Kevin Moloney for the New York Times)
An oil well pump jack runs on the plains near Douglas, Wyo., Thursday, November 22, 2013. The state will require pre-drilling testing of groundwater at sites where hydraulic fracturing, also known as "fracking" is used. (Kevin Moloney for the New York Times)
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