The Marcellus Shale Gas Field

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Two 18-wheel tractor trailers carry fresh water to natural gas wells... News PhotoAlternative Energy,Carrying,Climate Change,Economy,Environmental Issues,Finance,Fracking,Freshwater,Horizontal,Human Interest,Industry,Methane,Natural Gas,Natural Gas Field,Oil Industry,Pennsylvania,Pollution,Sewage,Tractor,USA,Waist Up,Water,WilliamsportPhotographer Collection: Getty Images News 2012 Robert NickelsbergWILLIAMSPORT, PA - SEPTEMBER 10: Two 18-wheel tractor trailers carry fresh water to natural gas wells being drilled by hydrofracking in the Marcellus Shale September 10, 2012 in Williamsport, Pennsylvania. Hydrofracking is a controversial drilling method which pumps millions of gallons of water, sand and chemicals into horizontally drilled wells to stimulate the release of the gas. The Marcellus Shale gas field stretches diagonally across West Virginia, Ohio, Pennsylvania and New York State. Drilling operations have provided Pennsylvania with billions of dollars of income through employment and tax revenue. The environmental impact is a politically sensitive issue in a resource dependent state. (Photo by Robert Nickelsberg/Getty Images)