A third runway at London Heathrow Airport is an idea that’s been kicking around since the 1980s. But it remains elusive, ...

A provocative new exhibit opening Sunday at the Baltimore Museum of Art is asking whether the chemical-riddled haze that blanketed London and Paris in the 19th and 20th centuries contributed to the ...

A new study finds that short-term air pollution exposure harms brain function, reducing focus and emotion recognition.

Here are the landfills that could take toxic waste from the L.A. wildfires in the coming weeks — many have not accepted ...