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Where Lead Lurks And Why Even Small Amounts Matter

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Orange sediment laced with heavy metals is visible in the path of water coming out of the Natalie/Occidental Mine in southwestern Colorado. This mine is one of dozens on a proposed Superfund listing pending with the EPA. Several mines in the area have been leaching the tainted water for years — well before the Gold King Mine spill. Grace Hood/Colorado Public Radio hide caption

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Grace Hood/Colorado Public Radio

One Year After A Toxic River Spill, No Clear Plan To Clean Up Western Mines

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The logo of German automaker Volkswagen AG can be seen on an administrative building at the Volkswagen factory on the day of the company's annual press conference on April 28 in Wolfsburg, Germany. Sean Gallup/Getty Images hide caption

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The village of Hoosick Falls, N.Y., sits along the Hoosick River in eastern New York. Elevated levels of a suspected carcinogen known as PFOA were found in the village's well water, which is now filtered. Hansi Lo Wang/NPR hide caption

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Hansi Lo Wang/NPR

Elevated Levels Of Suspected Carcinogen Found In States' Drinking Water

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Volkswagen CEO Matthias Mueller speaks to the media Sunday in Detroit, apologizing for the scandal that has plunged the German auto giant into crisis. Paul Sancya/AP hide caption

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Paul Sancya/AP

'We Didn't Lie,' Volkswagen CEO Says Of Emissions Scandal

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The Environmental Protection Agency said Monday that additional diesel Volkswagens were equipped with "defeat devices," making them run more cleanly during testing. Markus Schreiber/AP hide caption

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Markus Schreiber/AP

Kevin Murphy says he is proud of what he and the other workers do at the Rosebud mine, including digging the coal and reclaiming the land afterward. Amy Martin/Montana Public Radio hide caption

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Amy Martin/Montana Public Radio

New EPA Rules Motivate Montana To Look Beyond Coal

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After the Animas River spill, rancher Irving Shaggy is forced to travel a 70-mile round trip to get water for his livestock. "It's going to be a long struggle," he says. Laurel Morales/KJZZ hide caption

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Laurel Morales/KJZZ

Navajo Nation Farmers Feel The Weight Of Colorado Mine Spill

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Workers use perforating tools to create fractures in rock. An EPA study finds that "fracking" to reach and extract deep pockets of hydrocarbons has not caused widespread drinking water pollution. Brennan Linsley/AP hide caption

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Brennan Linsley/AP

EPA Finds No Widespread Drinking Water Pollution From Fracking

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Environmental Protection Agency Administrator Gina McCarthy testifies at an oversight hearing of the Senate Environment and Public Works Committee on Capitol Hill in Washington on July 23. J. Scott Applewhite/AP hide caption

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J. Scott Applewhite/AP

Attorney General Eric Holder listens at right as Environmental Protection Agency Administrator Gina McCarthy speaks during a news conference at the Justice Department in Washington on Monday. Evan Vucci/AP hide caption

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Evan Vucci/AP