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Calif. releases fracking rules for first time




US-Energy-Gas-Environment.Jeff Boggs, responsible for the drilling at Consol Energy poses infront of one of the company's Horizontal Gas Drilling Rigs exploring the Marcellus Shale outside the town of Waynesburg, PA on April 13, 2012. It is estimated that more than 500 trillion cubic feet of shale gas is contained in this stretch of rock that runs through parts of Pennsylvania, New York, Ohio and West Virginia. Shale gas is natural gas stored deep underground in fine-grained sedimentary rocks. It can be extracted using a process known as hydraulic fracturing – or
US-Energy-Gas-Environment.Jeff Boggs, responsible for the drilling at Consol Energy poses infront of one of the company's Horizontal Gas Drilling Rigs exploring the Marcellus Shale outside the town of Waynesburg, PA on April 13, 2012. It is estimated that more than 500 trillion cubic feet of shale gas is contained in this stretch of rock that runs through parts of Pennsylvania, New York, Ohio and West Virginia. Shale gas is natural gas stored deep underground in fine-grained sedimentary rocks. It can be extracted using a process known as hydraulic fracturing – or "fracking" – which involves drilling long horizontal wells in shale rocks more than a kilometre below the surface. Massive quantities of water, sand and chemicals are pumped into the wells at high pressure. This opens up fissures in the shale, which are held open by the sand, enabling the trapped gas to escape to the surface for collection.
MLADEN ANTONOV/AFP/Getty Images

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State regulators have released rules for "fracking." The controversial drilling process has sparked an oil and gas boom around the country, along with heated debate about the environmental costs. 

KQED's Science reporter Lauren Sommer has the story.