Washington records world’s worst air quality for a city after over 850,000 Fourth of July fireworks

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The Guardian - US 11 hours ago • theguardian.com

Washington records world’s worst air quality for a city after over 850,000 Fourth of July fireworks

Hourly concentrations of particulate matter rose to 6.7 times their pre-fireworks levels, according to an analysisWashington DC residents breathed in “unhealthy” air for hours after a 40-minute Independence Day fireworks…

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