The EPA repealed the key underpinning of greenhouse gas emission regulations. Now environmental and health advocates are taking the agency to court.

Birders inadvertently provided researchers at Loyola University with a key bit of documentation related to invasive species and microplastics.

Holding a snowy owl in his hands was a once-in-a-lifetime opportunity for bird rescuer Ken Reinert. It’s an experience he hopes he never has to repeat.

The National Weather Service is predicting highs in the 50s for the Chicago region through early next.

Environmental groups described the move as the single biggest attack in U.S. history against federal authority to address climate change. Evidence backing up the endangerment finding has only grown stronger in the 17 years since it was approved, they said.

If landscapes could talk, the 61-acre Greene Nature Preserve in Lake Forest would have quite the tale to tell.

Chicago's streak of sub-freezing days came to a merciful end Friday morning.

The Chicago Park District has unveiled a bold and ambitious updated framework plan for Grant Park.

January 2026 was notable for two significant departures from temperature norms in Chicago — in opposite directions.

Punxsutawney Phil and Woodstock Willie have issued competing prognostications.

Forecasters are anticipating two rounds of lake effect snow to dump anywhere from 3 to 6 inches of snow on portions of northeast Illinois and northwest Indiana, between Friday morning and Saturday evening.

Expect a gradual warm-up — relatively speaking — by the weekend, according to the National Weather Service.

Exploding trees have taken the country by storm. Let’s separate fact from fiction.

With an extreme cold warning in effect and actual air temperatures below zero in Chicago on Friday morning, several of the city's major cultural institutions have announced closures to the public.

Forecasters are warning Chicagoans to prepare for “dangerously cold temperatures” in the coming days as a deep freeze settles over the region.

Six bison released onto prairie in Kane County carry the weight of interwoven hopes: that they can heal both the land and the deep trauma borne by Indigenous people.