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Monarch butterflies migrate en masse, but they aren’t social creatures, scientists say. (Mageephoto / Pixabay)

Traveling more than 2,000 miles every year, the migration journey of monarch butterflies links the United States and Mexico in a way no trade agreement or cultural exchange ever could.

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A still image from a video taken of the demolition of the Crawford Coal Plant smokestack, April 11, 2020. (Alejandro Reyes / YouTube)

Three firms involved in the botched smokestack demolition in Little Village will pay $370,000 to settle a lawsuit filed by Illinois Attorney General Kwame Raoul, his office announced Thursday.

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General Iron’s metal-shredding operation in Lincoln Park. (WTTW News)

General Iron’s parent company has applied for its final permit to operate its metal-shredding operation on the Southeast Side, but federal officials have asked the city to hold off on making a decision.

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President-elect Joe Biden (CNN via WTTW News)

President-elect Joe Biden has pledged to make combating climate change a central pillar of his administration. And he campaigned on rejoining the Paris Climate Agreement.

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A section of the MWRD's Deep Tunnel. (Metropolitan Water Reclamation District of Greater Chicago / Facebook)

An upcoming virtual tour will offer insights into the Metropolitan Water Reclamation District’s inner workings and will revisit the reversal of the Chicago River. 

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An aerial view of the Chicago Area Confined Disposal Facility, a 45-acre site on Chicago’s Southeast Side that has been in operation since 1984. Inset: The CDF is outlined in red. (Credit: Army Corps of Engineers)

Community organizers on Chicago’s Southeast Side are marshaling their forces and looking for solutions to address what they see as yet another environmental threat to their already beleaguered neighborhood.

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A bighead carp, a type of Asian carp, caught in the Illinois River, the principal tributary of the Mississippi River. There are no North American fish large enough to eat Asian carp, according to the Asian Carp Regional Coordinating Committee. (Photo courtesy U.S. Geological Survey)

Efforts to increase demand for Asian carp as a food are aimed at buying time for development of a long-term solution to the threat posed by the invasive fish.

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(Satya Prem / Pixabay)

Owners of the controversial Dakota Access Pipeline have been given the go-ahead by Illinois to double capacity. Opponents aren't ready to give up the fight to block the expansion.

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U.S. Sen. Kamala Harris and Vice President Mike Pence participate in a debate Wednesday, Oct. 7, 2020. (WTTW News via CNN)

Health care, the environment and the economy were among the issues that got top billing Wednesday when the running mates of President Donald Trump and former Vice President Joe Biden faced off at their sole debate.

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Monarch butterflies have started their 2,000-mile migration south to Mexico. (Patty Wetli / WTTW News)

The annual migration of monarch butterflies is currently at its peak in the Chicago area. Several roosting sites have been spotted around town as the creatures use the city as a pit stop on their 2,000-mile journey to Mexico.

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Chicago’s Southeast Side. (WTTW News)

We speak with Angela Tovar, the city’s recently named sustainability officer, about a new air quality ordinance and improving Chicago’s environment.

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Floating habitat being positioned on the Chicago River. (Shedd Aquarium / Brenna Hernandez)

Rafts loaded with plants floated down the Chicago River last week, a strange sight that in decades past might have been the result of some sort of bizarre garbage spill but these days is a sure sign of the waterway’s ongoing “re-wilding.”

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(WTTW News)

Following a May explosion, General Iron has put appropriate controls in place to resume its metal shredding operation, experts say. Neighbors say they have little faith in the company’s commitment to compliance.

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Faith E. Briggs, in a scene from “This Land,” part of a virtual screening event. (YouTube)

The organization Environmentalists of Color is teaming up with the One Earth Film Fest to screen a pair of films focusing on the theme of “Outdoors While Black: Unpacking History, Reframing Safety & Taking Action.”

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Mayor Lori Lightfoot’s new report on air quality shows that while air pollution is a problem across the city, it’s worse in some neighborhoods than others. What her administration is planning to do about it.

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The Office of Inspector General has released a report on Streets & San's weed-cutting performance. (Bart Everson / Flickr)

An audit by the Inspector General’s Office found numerous flaws in the Department of Streets and Sanitation’s system of clearing weeds from vacant lots, including the lack of an up-to-date list of city-owned vacant property.

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