How does wildfire smoke in Canada impact air quality and trigger health hazards?

The City of Toronto once again registered as one of the worst cities in the world for air quality on Tuesday, as many wildfires in Ontario continue to burn and spread smoke for thousands of kilometres.

The same situation can be seen in other provinces across Canada, as wildfire seasons begin earlier expected, and the number of blazes grows higher than usual.

Eric Sorensen explains what the resulting air quality alerts mean, how they can affect your health and why we can expect more because of the changing climate.

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