New York TimesCLGenerally accurate and reliable· 6 days ago

Wildfires Rage in Ontario as Smoke Affects Toronto’s Air Quality

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15 July

Toronto experiences the world's worst air quality due to extensive wildfires in Ontario.

Air quality in Canada’s largest city was at times the worst in the world on Wednesday, as wildfires across Ontario sent smoke drifting into New York City and beyond.

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Story timeline

15 July

Toronto experiences the world's worst air quality due to extensive wildfires in Ontario.