Is the end in sight for recent round of Canadian wildfire smoke?
Air quality levels in parts of the U.S. plunge as Canada wildfires rage
Graphics show what smoke from wildfires in Canada has done to US skies
Canada wildfire smoke is affecting air quality in New York again
How air quality and wildfire smoke impact pregnant people
New York air quality among worst in world as haze from western wildfires shrouds city, New York
PHOTOS: Wildfire smoke impacts tri-state area
Ask an Expert: How Dangerous is Wildfire Smoke?
Nearly 1 in 5 Americans Live in Communities With Harmful Air Quality, Study Shows - Inside Climate News
See How the Wildfire Smoke Spread Across the U.S. - Scientific American
Photos show New York haze caused by Canada wildfire smoke
Canada wildfire smoke: New York City has world's worst air pollution