The Illinois EPA said it reviewing the proposal to rescind the declaration issued back in 2009 under President Barack Obama.

The Trump administration’s U.S. Environmental Protection Agency proposed on Tuesday revoking a science-based determination ...

The “endangerment finding” is the legal underpinning of a host of climate regulations for motor vehicles, power plants and ...

Q: I prefer to exercise outside, but when the air quality is poor, I'm concerned about the potential health effects. What should I do? Across the country, smoke from wildfires — including ...

Air pollution isn't just bad for your lungs—it may be eroding your brain. In a sweeping review covering nearly 30 million ...