A fleet of air quality monitoring vehicles took to the streets of California yesterday, marking the start of a year long ...

"You can find daily ozone forecasts and real-time ozone conditions for over 300 cities across the country at the AIRNow Web site: airnow.gov," the EPA says. Residents across parts of Arizona faced ...

According to the Environmental Protection Agency (EPA), ozone exposure can irritate the respiratory tract, causing coughing, ...