Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as "unhealthy" ...

PHILADELPHIA (CBS) -- Air Quality Index (AQI) refers to the Environmental Protection Agency's scale regarding the health impact of air quality and pollution in the U.S., regulated under the Clear Air ...

PHILADELPHIA (WPVI) -- With smoke blowing into the Philadelphia region from the wildfires in Canada, you may have heard a lot about the Air Quality Index or AQI. But what it is, exactly? The Air ...

Record dangerous air quality levels continued in parts of the eastern U.S. on Thursday as smoke from Canadian wildfires continues to flow across the border. The Air Quality Index (AQI) is a measure of ...

Keeping cool can make you sick. If you’ve ever felt a sniffle coming on in the summer months — particularly when you’re on vacation — then air conditioning could be to blame. According to a 2004 study ...

A chiropractic neurologist revealed a simple exercise that could alleviate one of the worst, most common but surprising symptoms of anxiety — “air hunger.” Medically referred to as dyspnea, air hunger ...

What is turbulence, and how bad can a bumpy flight really be? The answer to the latter question is, well, pretty bad, as four Alaska Airlines crew members learned the hard way over the holidays after ...