air quality

A string of wildfires darkened skies Wednesday and Thursday in the Pacific Northwest, where residents of the normally lush, green region experienced the world’s worst air pollution.

Breathing cleaner air is vital to your long-term health, so expect benefits if you live in one of these seven least polluted U.S. states, a new report says.

Ozone is a beneficial gas in our atmosphere but when it’s highly concentrated at ground-level, it can have a harmful impact on our respiratory systems. Here’s what you need to know.

Looking for ways to beat the heat? Check out this list of spraygrounds and cooling centers in Philadelphia.

The clear skies greeting Olympic athletes in Beijing this month are a stark change from just a decade ago when the city’s notorious air pollution often made it difficult to make out nearby buildings.

Companies should be paying closer attention to how indoor air quality can help prevent the spread of Covid-19 and improve employees’ cognitive function.

When it comes to air quality in Pennsylvania, the Lehigh Valley ranks among the worst, according to a new study. NBC10’s Steven Fisher shows us what Pennsylvania leaders plan to do to change that.