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(Creative Commons /  © 2013, Jeremy Atherton)

Chicago is the country’s 22nd most polluted city, according to a new study of air pollutants by the American Lung Association. 

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(redlegsfan21 / Wikimedia)

In an effort to reduce plastic waste, the White Sox have become the first team in Major League Baseball to get rid of disposable straws for nearly an entire season.

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(Tim Evanson / Flickr)

A bill that supporters say would make fracking operations in Illinois more transparent cleared its first legislative hurdle last week.

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(Creative Commons /  © 2013, Jeremy Atherton)

A coalition of states and cities sue the EPA over its regulation of emissions of methane, a potent greenhouse gas that contributes to global warming. 

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(Courtesy Shedd Aquarium)

For the first time, Shedd Aquarium will host a full week of events leading up to Earth Day on April 22. 

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An overhead view of Watco Transloading's storage terminal on Chicago's Southeast Side. Watco is one of at least two facilities in the area that handle manganese. (Google)

An ordinance to protect residents from a potentially brain-damaging pollutant is passed by the City Council. But does it go far enough?

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(Pixabay)

Despite the industry’s recent decline and new tariffs, Illinois’ solar market is expected to grow significantly in the coming years, according to a new report. 

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The Chinese tech company Foxconn wants to withdraw 7 million gallons of water a day from Lake Michigan for its proposed new Wisconsin plant. But would that violate the compact to protect the Great Lakes?

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More than 11,000 people worldwide studied digital images of the liverwort plant as part of a Field Museum-led study that linked research professionals with citizen scientists. (Courtesy Field Museum)

From kindergartners to college professors, citizen scientists helped Field Museum researchers examine more than 100,000 plant samples that could hold clues to key scientific questions. 

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(Chicago Tonight file photo)

The Chicago River is cleaner today than it has been in generations, but “cleaner” is a relative term. One local advocacy group wants the city to aim for a trash-free river.

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A woman covers her mouth with a handkerchief while walking through the streets of Ahmedabad, India. (Jill Ryan / WBUR Boston’s NPR News Station / Flickr)

Air pollution kills more than one million people every year in India. A team of Chicago students are now developing an app they think will give Indians the tools needed to confront the deadly problem.

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(Jeremy Atherton / Wikimedia Commons)

A new investment strategy calls for Chicago to redirect funds toward companies that prioritize environmental responsibility and social causes, but local climate activists say the plan falls short.

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(Google Maps)

A brain-damaging pollutant found at high levels near thousands of Southeast Side homes would be banned at future industrial sites under a new ordinance introduced by city officials Wednesday.

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Recently introduced legislation would update Illinois’ fracking law to increase protections for land owners and require more information from oil and gas companies applying for fracking permits.

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Despite a commitment from the state’s top environmental official, Illinois EPA will not hold public meetings to gather input on the state’s plan for spending $107.8 million in Volkswagen settlement money.

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(uveX / Pixabay)

Chicago could see a significant increase in electric cars by the end of the next decade, but drivers will need the city to install thousands of new charging stations to keep those cars on the road.