New York City topped the list of the world's worst air pollution Tuesday morning as harmful smoke wafted south from more than a hundred wildfires burning in Quebec.

Smoke from Canada's fires has periodically engulfed the Northeast and Mid-Atlantic for more than a week, raising concerns over the harms of persistent poor air quality. New York City's air quality index peaked above 150 on Tuesday, according to IQair - a level of pollution that is "unhealthy" for sensitive groups like the elderly, young children and those with respiratory issues. https://abc7ne.ws/45ON2v6

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