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Gizmo Uses Lung Cells To Sniff Out Health Hazards In Urban Air

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Houston's Petrochemical Industry, Source Of Jobs And Smog

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An evening view of the Exxon Mobil oil refinery complex in Baton Rouge, La. John W. Poole/NPR hide caption

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Baton Rouge's Corroded, Overpolluting Neighbor: Exxon Mobil

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The Houston Ship Channel is home to a wide range of heavy industry, including chemical processing plants and petrochemical refineries. Richard Harris/NPR hide caption

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Breathing Easier: How Houston Is Working To Clean Up Its Air

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A haze can be seen at night hovering over the Asarco copper smelter, which turns copper ore into nearly pure copper bars. Emma Schwartz/Center for Public Integrity hide caption

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EPA Takes Action Against Toxic Arizona Copper Plant

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N.Y. Plant's Neighbors Expose Regulatory Gaps

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The Ash Grove Cement Kiln, as seen from an aerial photograph, sits on the northern edge of Chanute, Kan. David Gilkey/NPR hide caption

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EPA Regulations Give Kilns Permission To Pollute

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The Continental Carbon plant sits on the southern outskirts of Ponca City, Okla. Until August, the plant was on an internal EPA "watch list," for violating rules of the Clean Air Act. David Gilkey/NPR hide caption

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Secret 'Watch List' Reveals Failure To Curb Toxic Air

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The Continental Carbon plant sits on the southern outskirts of Ponca City, Okla. Residents blamed the plant, which produces a black dust known as carbon black, for polluting their city. David Gilkey/NPR hide caption

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Oklahoma Town Battles Powdery Carbon Pollution

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