Two-Thirds Of U.S. Gas Supply Now Comes From Fracking

Hydraulic fracturing, the method used to extract oil and natural gas from shale formations deep underground, has gone from a niche activity to the process responsible for more than two-thirds of U.S. gas supply.

Fracking now accounts for 67 percent of marketed gas output, up from less than 7 percent in 2000, according to the U.S. Energy Information Administration.

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