Montreal has worst air of any major city

Forest fires in Canada left Montreal blanketed with smog on Sunday, giving it the worst air quality of any major city in the world, according to a pollution monitor. Quebec province's most populous city had 'unhealthy' air quality according to IQAir, as hundreds of wildfires burned across the country. Environment Canada issued smog warnings in several Quebec regions due to the fires, saying, "high concentrations of fine particulate matter are causing poor air quality and reduced visibilities," with conditions to persist until yesterday morning.

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