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HOW DOES FRACKING WORKS
A high-pressure mixture of water, sand and chemicals blasts deep into shale, splitting it open and allowing oil and gas to flow. Improved technology has given energy companies access to stores of natural gas underneath states from Wyoming to New York in the U.S. In Europe, Poland is considered the most promising location.
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ENVIRONMENTAL FEARS
Fracking is hard on the environment and has triggered minor earthquakes. It consumes enormous amounts of water and leaves chemicals behind. France banned fracking in 2011. In Britain, where permits may be granted in the next two years, the prospect has touched off protests. A September U.S. study found that drilling and fracking don't seem to spew immense amounts of methane, strengthening a big selling point for natural gas that it's not as bad for global warming as coal. That study didn't address concerns about potential air and water pollution.
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ECONOMIC BENEFITS
Europeans pay among the world's highest energy prices. Americans pay about a third as much wholesale, and analysts say the low prices and the U.S. economic recovery are largely attributable to fracking. In France, the average annual household energy bill is $3,120 (2,300 euros), compared with $2,024 (1,495 euros) and falling in the U.S., according the Energy Information Administration.
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