The Lehigh Valley had the worst air quality in the world Wednesday, according to the website that monitors the United States Air Quality Index. So, what is it about the smoke coming down from the ...

Air quality is dominating conversations in Milwaukee and across southeastern Wisconsin due to the acrid haze from wildfires in eastern Canada. But how is it measured and what does it mean? Here's some ...

Wildfire smoke from Canada has clouded much of the Northeast, leaving millions of Americans exposed to unhealthy levels of particulate matter. Here’s what you need to know on the dangers of wildfire ...

Wildfire smoke from Canada has clouded much of the Northeast, leaving millions of Americans exposed to unhealthy levels of particulate matter. Here's what you need to know on the dangers of wildfire ...

What is particulate matter? How do I interpret the AQI? There's a lot to learn since Canadian wildfires suddenly sent clouds of hazy smoke over the border and into parts of the Midwest, Northeast and ...

Long-term exposure to specific particulate matter components, such as PM2.5, including sulphate, ammonium, elemental carbon, ...

Air pollution ranks among the world's deadliest threats, causing an estimated 8 million deaths in 2021, according to a recent analysis from a United Nations partnership. That same year, pollutants ...