Fracking the Eagle Ford: What Chemicals Are Spewed From Oil Wells - GRAPHIC

Developing oil and gas wells, like the 7,000 in the Eagle Ford Shale, releases various air pollutants, some of which are shown in this simplified diagram.

Credit: Paul Horn, InsideClimate News

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

MORE: Fracking Boom Spews Toxic Air Emissions on Texas Residents

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