FAIRFIELD TOWNSHIP, PA – SEPTEMBER 8: A soybean field lies in front of a natural gas drilling rig September 8, 2012 in Fairfield Township, Pennsylvania. The area sits above the Marcellus Shale where the search for natural gas uses a controversial method known as hydrofracking. Hydrofracking involves pumping 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.