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D.C. Air Quality After Fourth of July Fireworks | Washington DC News
DC’s Fourth of July fireworks turned into a public health emergency as air quality plummeted to record lows, triggering a Code Red alert and exposing deeper, year-round pollution problems. PM2.5 levels spiked sixfold, lingering for hours before rain helped clear the smoke. Compounded by a heat dome that boosted ground-level ozone — a lung irritant linked to car exhaust and UV rays — the city’s air quality woes are persistent. Despite progress in cutting pollution, D.C. still fails federal standards and earns poor marks from health groups. With nearly 200,000 residents suffering from…
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