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Hundreds of anglers participate in the #ChicagoFishes event Oct. 13 to celebrate decades of cleanup efforts to the Chicago River. (© Shedd Aquarium)

An American eel caught by a 5-year-old angler last week is possibly the first such eel ever recorded in the Chicago River, according to the Illinois Department of Natural Resources.

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(Daniel Dionne / Flickr)

A new poll on climate and energy reveals surprising attitudes from Americans. We talk with the leader of the University of Chicago study group.

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EPA Administrator Scott Pruitt speaks April 19 after meeting with residents of East Chicago’s lead-contaminated neighborhoods. (Alex Ruppenthal / Chicago Tonight)

Since 2010, the EPA has cited an East Chicago steelmaking facility six times for violations of the Clean Air Act. Now, a group representing nearby residents intends to sue EPA Administrator Scott Pruitt over the renewal of the company’s operating permit.

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(© Shedd Aquarium / Brenna Hernandez)

Since embarking on a new sustainability initiative, Shedd Aquarium has cut annual water use by more than half, from 60 million gallons in 2012 to 28 million gallons today.

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Before and after photos show an incidence of illegal dumping in Chicago. (Courtesy of Chicago Department of Streets and Sanitation)

Fifteen new high-resolution security cameras will target those who illegally dump old furniture, tires and other waste across the city.

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Sea creatures made from flip-flops, beach toys, water bottles and other plastic garbage that washed ashore are part of a new exhibit illuminating the proliferation of pollution in the world’s waterways.

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(Joel Wintermantle / University of Chicago)

A public art installation along the Chicago River aims to bring the realities of climate change in Antarctica to Chicago. 

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(Courtesy Chicago Mayor's Office)

A new analysis of citywide carbon emissions data shows that Chicago is 40 percent of the way to meeting emission reduction targets set under the Paris climate deal. 

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Ping Tom Memorial Park at the Chicago River (Courtesy Metropolitan Planning Council)

Cook County Board President Toni Preckwinkle and about a dozen other elected officials will take part in a fundraiser aimed at boosting efforts to improve the quality of the river’s water.

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What part – if any – does global warming play in the intensity of hurricanes? And what infrastructure failures contribute to the utter loss and destruction during extreme weather?

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(Ameren Illinois / Facebook)

State regulators signed off Monday on an energy savings plan that consumer advocates say could cost downstate residents nearly 30 percent in savings on utility bills.

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(Friends of Big Marsh / Facebook)

Grant funding will be used to restore wetlands and improve water flow at a 278-acre park that opened last year at a former industrial site on Chicago’s Southeast Side.

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(Tim Evanson / Flickr)

A Kansas company that last week won approval of Illinois’ first horizontal fracking permit has been cited with more than two dozen violations in multiple states, records show.

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(Google Maps)

Chicago public health officials have given the Southeast Side company an additional week to come up with an improved plan for reducing emissions of manganese dust.

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Despite more than 5,000 public comments opposing the permit, the Illinois Department of Natural Resources this week approved an application for the controversial oil-drilling practice.

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(Mark Lopez / Argonne National Laboratory)

New technologies that could change the way we live and work will be on display this month during a reality TV-inspired competition sponsored by the U.S. Department of Energy.