The Air Quality Index is a scale used for daily reporting of how clean or polluted the air is, and what health effects might ...

The EPA's Air Quality Index can tell you whether breathing outside air can hurt you. How to read the scale.

Wildfires in Canadian provinces of Manitoba and Saskatchewan are creating smoke visible in Michigan. How to use the air ...

Air quality alerts hit Texas, Louisiana, and Arkansas as ozone and pollution rise, posing health risks to vulnerable groups.

A new report on air quality across the United States offered a cloudy prognosis on the long-term health of about 156 million residents who live in areas that received an "F" in smog and soot pollution ...

Air quality in Los Angeles has improved as the Palisades and Eaton wildfires get under control. But as the fires burned through houses, cars and industrial areas, they spewed out vast amounts of smoke ...

In the time it takes to type this sentence, I will have taken three breaths. Twelve in a minute, 20,000 a day, 7.5 million a year, most of them indoors. Yet until quite recently, researchers have not ...

Officials warn that ozone pollution levels are expected to reach unhealthy levels in Chicago over the next two days.

The Coachella Valley's air gets dusty — but how dusty, exactly? How scientists use a new tool to measure, and what you can do when air quality is bad.

The Texas Commission on Environmental Quality issued Air Quality Alerts on Wednesday, May 13 for different parts of the state ...