09
Mar
Air quality worsens in the US (Midwest/Central/South/Northeast)
The air quality (AIRNow; top, left) in almost half the country was mostly in the moderate range. In the upper Midwest – Minnesota and Wisconsin – unhealthy levels (for sensitive groups) of PM2.5 were recorded in the morning and it…
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Air quality worsens in the US (Midwest/Central/South/Northeast)
Tags: almost-half, country, half-the-country, midwest, morning, the-country, the-moderate, unhealthy-levels, wisconsin