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Chemical fingerprints point to fracking as culprit behind new methane emissions

Frack mining
Men work on a natural gas valve at a hydraulic fracturing site in June 2012 in South Montrose, Pa. Hydraulic fracturing, also known as fracking, stimulates gas production by injecting wells with high volumes of chemical-laced water in order to free-up pockets of natural gas below.
Spencer Platt | Getty Images 2012