Breathing in polluted air for extended periods of time can pose a serious health risk for people, especially for vulnerable populations.

The hazy air hovering over US cities, including Chicago and New York, this summer is reminding Americans of just how ...

Breathing in polluted air for extended periods of time can pose a serious health risk for people, especially for vulnerable populations.

Smoke from Canadian wildfires hovered over the U.S. Midwest Saturday, prompting unhealthy‑air alerts across many states ...

More poor air quality days are happening in Mass. from wildfire smoke. Does that mean we're all smokers now? Here are the ...