At least 12 states experiencing 'hazardous' and 'unhealthy' air quality from Canadian wildfire smoke
The states with the most severe air quality indices, rated "very unhealthy" to "hazardous" by the EPA, include most of the Great Lakes area.
The states with the most severe air quality indices, rated "very unhealthy" to "hazardous" by the EPA, include most of the Great Lakes area.
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