By a 6-3 vote, with conservatives in the majority, the court said that the Clean Air Act does not give the Environmental Protection Agency broad authority to regulate greenhouse gas emissions from power plants that contribute to global warming.

Researchers at Lincoln Park Zoo are surveying which ticks are present in the Chicago region, looking for clues about the effects of climate change and urban sprawl, and busting myths in the process.

A Florida man drowned Monday in Lake Michigan after pulling a teenage female to safety from the water off Porter Beach at Indiana Dunes National Park, officials said.

The five planets that are visible to the naked eye are now lining up in a particularly unique formation in the early morning hours, all of them appearing in the same part of the sky. Want to catch the show? We’ve got tips.

Illinois is rebranding Asian carp as “copi” in a bid to get people to eat the invasive fish into submission. Fishermen are catching thousands of pounds a day and barely making a dent in the number of carp in waterways like the Illinois River, where it's estimated 20 million to 50 million could be harvested annually.

In 2021, worldwide emissions from making cement for buildings, roads and other infrastructure hit nearly 2.9 billion tons of carbon dioxide, which is more than 7% of the global carbon emissions. Twenty years ago, in 2002, cement emissions were some 1.4 billion tons of carbon dioxide.

We all knew that Granddad, the Shedd Aquarium’s long-lived Australian lungfish, was an old-timer. Now, five years after he shuffled off to the big fish tank in the sky, Granddad’s true age has been revealed.

The recent heat wave, coupled with lower than normal precipitation, has produced conditions ripe for what’s known as a “flash drought” in the Chicago area.

Friends of the Parks is re-starting the conversation surrounding the gaps in Chicago’s lakefront park system and what those four miles could mean for shoreline protection, promoting biodiversity and delivering green space to areas where it’s in short supply.

As a pair of wildfires skirt Flagstaff, the flames are crossing land dense with reminders of human existence through centuries — multilevel stone homes, rock carvings and pieces of clay and ceramic pots that have been well-preserved in the arid climate since long before fire suppression became a tactic.

In the coming week, about 70% of the U.S. population will see temperatures in the 90s, and almost 20% of people in the country will experience temperatures greater than 100 degrees. Many major metro areas, including Minneapolis, Chicago, Nashville, Memphis, Dallas, New Orleans and Atlanta, may experience temps near or above 100.

 Gov. J.B. Pritzker officially added the eastern milksnake to the list of state symbols Thursday.

The week started off with a tornado in the western suburbs. Then, the Chicagoland area was hit with an excessive heat warning. It ended up being our warmest stretch of days in 10 years.

Members of the SailGP international yacht racing league have converged on Chicago for an upcoming competition, but before taking their catamarans onto Lake Michigan this weekend, the athletes piled into canoes and helped install native aquatic plants along the Chicago River's banks.

The National Weather Service maintained an excessive heat warning through Wednesday evening for most of Illinois, Indiana and Ohio, which have been dealing with the sticky humidity and soaring temperatures since Tuesday. 

A supercell system walloped much of northeast Illinois and northwest Indiana on Monday night.