FILE - This March 25, 2014 file photo shows perforating tools, used to create fractures in the rock, lowered into one of six wells during a roughly two-week hydraulic fracturing operation at an Encana Corp. well pad near Mead, Colo. The energy boom is scrambling national politics. Democrats are split between environmentalists and business and labor groups. Some deeply-conservative areas are allying with conservationists against fracking, the technique largely responsible for the surge. (AP Photo/Brennan Linsley, File)
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