Wildfire smoke drifting over the Washington, D.C., area is making the skies look hazy and negatively affecting air quality.

This Is the Fall Weather Prediction for Your Region, According to "The Old Farmer's Almanac" A Spelunker Thought She Found ...

Canadian wildfire smoke, along with high clouds blanketing much of the Philadelphia region, will lend a hazy appearance to ...

Toronto is among the most polluted cities in the world on Monday morning as the city remains under a special air quality ...

Smoke from ongoing Canadian wildfires has led to some of the worst air quality in the world across parts of the U.S.

Smoke from Canadian wildfires hovered over several Midwestern states Saturday, bringing warnings of unhealthy air for at least the third day.

New details are emerging about the deadly collision between an American Airlines flight and an Army helicopter in January ...

Health experts are not currently concerned about air quality in Toronto but warn prolonged exposure to moderate risk air may ...

Federal actions like the 1970 Clean Air Act and the 1972 Clean Water Act helped regulate water and air pollution.