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Illinois Gov. Bruce Rauner is supporting a bill that would require testing of groundwater near quarries where construction debris is dumped.

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The Chicago River is a lot cleaner than it used to be. And after years of litigation, the Metropolitan Water Reclamation District and environmental groups have agreed to a settlement and will work together to make the river even cleaner. 

Part 3 of our series examining pollution on Chicago’s Far Southeast Side

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S.H. Bell’s South Avenue O Terminal in Chicago (Chicago Tonight)

A group of Southeast Side residents and activists met Tuesday night to formulate a plan for confronting the latest threat of pollution in one of Chicago’s most industrialized areas.

Part 2 of our series examining pollution on Chicago’s Far Southeast Side

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The carefully documented history of manganese emissions in a small Ohio city serves as a warning for those concerned about newly discovered manganese concentrations on Chicago’s Far Southeast Side.

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S.H. Bell Co., a company linked to potential manganese pollution on Chicago’s Far Southeast Side, said Thursday it is not the sole emitter of manganese dust in the area. 

Part 1 of our series examining pollution on Chicago’s Far Southeast Side

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(Alex Ruppenthal / Chicago Tonight)

For decades, residents on Chicago’s Far Southeast Side lived with clouds of black dust from nearby industrial sites. Now, the community faces a more dangerous pollutant: manganese. 

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The decadeslong fight to clean up the Chicago River took a step forward last week with the resolution of two lawsuits targeting phosphorous discharge that has polluted waters from Chicago to the Gulf of Mexico.

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Pollution causes 10 million deaths per year, according to an upcoming report written by 50 researchers and policymakers, including Chicago-based energy experts.

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The Environmental Protection Agency recently installed a park bench equipped with air pollution sensors at a CPS elementary school. It's one of just seven such benches in the U.S.

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Not that long ago, air pollution from burning coal made the Windy City more like the Smoggy City. Geoffrey Baer tells us how Chicago cleaned up its act. He'll also explore the Kentucky Colony that settled in the city and the history of a pediatric hospital on the South Side.