A Pioneer Drilling Co. sign stands at the entrance to an Alta Resources LLC natural gas well site near Montrose, Pennsylvania, U.S., on Monday, April 5, 2010. Companies are spending billions to dislodge natural gas from a band of shale-sedimentary rock called the Marcellus shale that underlies Pennsylvania, West Virginia and New York. The band of rock, so designated because it pokes through near a city of that name in northern New York, may contain 262 trillion cubic feet of recoverable gas, the U.S. Department of Energy estimates. Photographer: Daniel Acker/Bloomberg via Getty Images
{"Image ImageDescription": "A Pioneer Drilling Co. sign stands at the entrance to an Alta Resources LLC natural gas well site near Montrose, Pennsylvania, U.S., on Monday, April 5, 2010. Companies are spending billions to dislodge natural gas from a band of shale-sedimentary rock called the Marcellus shale that underlies Pennsylvania, West Virginia and New York. The band of rock, so designated because it pokes through near a city of that name in northern New York, may contain 262 trillion cubic feet of recoverable gas, the U.S. Department of Energy estimates. Photographer: Daniel Acker/Bloomberg via Getty Images", "Image Copyright": "2010 Bloomberg"}