Fine particulate matter, or PM2.5, refers to particles less than 2.5 micrometers in diameter, small enough to penetrate deep into the #lungs & enter the #bloodstream. #Ozone is a #smog-causing gas that forms when nitrogen dioxide & volatile organic compounds are emitted from power plants, factories & vehicles & mix in the #air on hot, sunny days.
#Trump #EPA #law #EnvironmentalLaw #PublicHealth #pollution #health