Gov. J.B. Pritzker speaks at G&W Electric Co. in Bolingbrook on April 15, 2024, to highlight its microgrid, which includes one of the largest batteries in the country. Also pictured (left to right): Bolingbrook Mayor Mary Alexander-Basta, Commonwealth Edison CEO Gil Quiniones and G&W chair and owner John Mueller. (Andrew Adams / Capitol News Illinois)
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Even as solar projects have boomed in Illinois in recent years, the head of the state agency responsible for approving renewable projects said changes to state law may be necessary to phase out fossil fuels by 2050.

An eastern meadowlark, recently killed in a collision with a Chicago building. (Courtesy of Chicago Bird Collision Monitors)

Spring migration is still weeks away from reaching its peak in Chicago and already the tiny body bags are piling up, filled with birds killed in collisions with the city’s glass buildings.

A graphic that says "The Return of the Cicadas." (WTTW News)

In case you haven’t heard, the cicadas are coming, and things are about to get loud. WTTW News explains.

Brumby, a 2-year-old koala, is coming to Brookfield Zoo Chicago. (Courtesy of San Diego Zoo)

For the first time in its 90-year history, Brookfield Zoo Chicago will welcome koalas.

(WTTW News)
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Illinois has the most lead pipes per capita of any state, according to a 2023 study by the U.S. Environmental Protection Agency.

Four active eagle nests are being monitored in the Forest Preserve District of Will County in 2024. (Forest Preserve District of Will County / Chad Merda)

Sharp-eyed observers have now confirmed hatchlings in three of the four bald eagle nests being monitored on Will County forest preserve property.

Lights on the Museum Campus will be out during upgrades to electrical equipment. (Patty Wetli / WTTW News)

Lights will be out in parking lots and along portions of the lakefront bike and pedestrian trails from 7 p.m. Friday to 8 p.m. Sunday.

(Brian Yurasits / Unsplash)

Alliance for the Great Lakes has collected 20 years’ worth of data from beach cleanups. Tiny plastic trash is a huge problem.

(Karolina Grabowska / Pixabay)

Chicago’s water has been tested numerous times for the presence of so-called “forever chemicals,” and the substances have never been detected.

Imani at Montrose Beach, April 2023. (Matthew Dolkart)

Wildlife officials are reporting that the season’s first Great Lakes piping plover, known as YibBee, has returned to his breeding grounds at Sleeping Bear Dunes. Will arrivals in Chicago be far behind?

(Patty Wetli / WTTW News)

Instead of trashing those vital eclipse glasses, recycle them at any one of dozens of Chicago locations.

(Nicole Cardos / WTTW News)

Nearly 2,000 people gathered at Triton College in west suburban River Grove to view the solar eclipse Monday afternoon.

Hundreds of people gather at the Adler Planetarium to view the eclipse on April 8, 2024. (WTTW News)

Hundreds of people gathered outside the Adler Planetarium in downtown Chicago for a viewing party. People brought telescopes, cameras and the necessary protective eyeglasses.

The moon partially covers the sun during a total solar eclipse, as seen from Eagle Pass, Texas, Monday, April 8, 2024. (AP Photo / Eric Gay)

It promised to be North America’s biggest eclipse crowd ever, thanks to the densely populated path and the lure of more than four minutes of midday darkness in Texas and other choice spots. Almost everyone in North America was guaranteed at least a partial eclipse, weather permitting. 

The 2017 solar eclipse. (Credit: NASA)

A total solar eclipse is set to move across the United States Monday afternoon with the path of totality sweeping from Texas up to Maine. Watch as it unfolds with NASA scientists. 

A city of Chicago outfall at the Wild Mile floating wetland installation on the North Branch of the Chicago River. (Patty Wetli / WTTW News)

“Chicago owns the most outfalls that discharge into the river system, and controlling what comes out of them is essential to reach our shared vision for a fishable-swimmable river that is accessible to everyone,” said Margaret Frisbie, executive director of Friends of the Chicago River.