Air pollutants are released at every stage of oil and gas extraction. This diagram shows some of the many emission sources during drilling, fracking, production and processing at an oil well in the Eagle Ford Shale.
The diagram is part of an eight-month investigation into the air pollution effects of one of the biggest energy booms in America by InsideClimate News, the Center for Public Integrity and The Weather Channel.
MORE: Fracking the Eagle Ford Shale: Big Oil and Bad Air on the Texas Prairie
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