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Air quality has declined in parts of the country due to the presence of wildfire smoke coming down from Canada. Wildfire smoke contains carbon monoxide, carbon dioxide and fine particulates that ...
The Weather Network on MSN4d
Prepare for poor air quality as thick smoke returns this weekend
A system approaching the region will wrap thick smoke onto the southern Prairies and portions of southern Ontario into this ...
Residents of central Pennsylvania should prepare for hazy skies and reduced air quality today as wildfire smoke from Canada ...
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