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"Fracking", a Way to Extract Natural Gas, Stirs Debate
December 22, 2011 7:00 PM
1
Land is cleared for drilling in Pennsylvania’s Loyalstock State Forest (Photo: Pennsylvania DCNR)
2
On a job in northern Pennsylvania, Chesapeake Energy Corporation trucks ship in water, sand and production chemicals for fracturing. (Rosanne Skirble/VOA)
3
Gas operations are common in rural Pennsylvania, which since 2005 has issued 4,000 drilling permits. (Rosanne Skirble/VOA)
4
The 15-20 million liters of water used to hydraulically frack each well are either trucked to the site or pumped over ground from nearby water sources. Credit: Marcellus Shale U.S.
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