Very unhealthy pollution levels record..

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"Very unhealthy" pollution levels recorded in D.C. after July 4th fireworks

https://www.cbsnews.com/news/a....ir-quality-alerts-dc

Air quality in and around D.C. improves after July 4th fireworks brought

www.cbsnews.com

Air quality in and around D.C. improves after July 4th fireworks brought

A purple air quality alert was issued for Washington, D.C., and surrounding areas, on Sunday, meaning pollution reached levels considered very unhealthy.

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