As of Thursday morning, Chicago, Detroit and Washington, D.C. were ranked as the three cities with the worst air quality in the world, according to IQ Air's Air Quality Index. Canada has over 250 ...

WASHINGTON — The smoke from hundreds of ongoing wildfires in Canada has been causing problems across the United States and tens of millions of people are once again facing unhealthy air alerts. The ...

Smoke from Canadian wildfires is causing air quality concerns and hazy skies for many Americans in the Midwest and Northeast for another day this week. Map shows air quality alerts in effect Wednesday ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Air quality in areas across the Northern and Midwest U.S. will continue to be affected by smoke pouring down from ...

It wasn’t that long ago that few people were monitoring the air—not the government, not its citizens. Today, weather apps provide estimates of outdoor air quality, and the government’s own air quality ...