Toronto’s air quality ranked worst in the world as wildfire smoke drifts into region CTV NewsToronto’s air quality ranked world’s worst as wildfire smoke settles in Global NewsAir quality expected to be poor again northeast of Sault SooToday.comToronto’s air quality 3rd‑worst in the world as heat hammers city CityNews TorontoWildfire smoke from Canada will soon spread across the Midwest and East The Washington Post
