Wildfires in Ontario Make Toronto Air Quality Worst in World The skies above Toronto have turned a sickly yellow, shrouding one of North America's most populous cities in a toxic haze.
This is not just an issue with air quality – it's also a matter of unease for residents living through the world's worst current air pollution crisis.
More than 100 wildfires are raging across northern Ontario, forcing thousands to flee their homes.