This time last year, hazy smoke filled the air around our region from massive wildfires burning in Canada. The air quality over Philadelphia was so bad the sky turned a deep orange-red color and visibility dropped to less than a mile.
This time last year, hazy smoke filled the air around our region from massive wildfires burning in Canada. The air quality over Philadelphia was so bad the sky turned a deep orange-red color and visibility dropped to less than a mile.