Washington, Chicago, Detroit have some of the worst air quality in the world: Live updates
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Smoke from wildfires raging in Canada engulfed more U.S. cities on Thursday, leading to perilous air quality for millions of Americans.
Published
Smoke from wildfires raging in Canada engulfed more U.S. cities on Thursday, leading to perilous air quality for millions of Americans.
ViewMore than 100 million Americans from Iowa to Maine started Thursday under air quality alerts as wildfire smoke from Canada..
Health authorities in Ohio joined those in other states in warning residents to take precautions due to unhealthy air because of..