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Associated Press | April 18, 2012 : New EPA standards will control fracking emissions
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The Obama administration on Wednesday set the first-ever national standards to control air pollution from gas wells that are drilled using a method called hydraulic fracturing, or fracking, but not without making concessions to the oil and gas industry.
Last March, pollution from natural gas drilling in the Upper Green River Basin in western Wyoming triggered levels of ground-level ozone, the main ingredient in smog, worse than those recorded in Los Angeles, one of the smoggiest cities in the U.S.
Read more: http://www.npr.org/2012/04/18/150890137/epa-to-slash-air-pollution-from-natural-gas-wells