Washington Post throws cold water on DC fireworks with report of ‘hazardous air pollution’

The Washington Post reports that fireworks for President Donald Trump's July Fourth celebration in Washington D.C. could cause hazardous air pollution with PM2.5 levels reaching 600-1,200 micrograms per cubic meter around the National Mall. Internal National Park Service documents warn of 'very unhealthy' conditions, advising attendees to use N95 masks and avoid prolonged exposure due to respiratory and cardiovascular risks.