Ozone

A highly reactive gas formed in the atmosphere – in the presence of sunlight and heat – by a complex series of photochemical reactions involving oxides of nitrogen and organic gases. National Ambient Air QualityStandards set up by the Environmental Protection Agency to measure the health impacts of air pollution. EPA established standard measures for six pollutants: carbon monoxide, ozone, particulate matter, lead, sulfur dioxide and nitrous oxide. The transportation provisions of the Clean Air Act focus on ozone and carbon monoxide standards. More Standards have been established for ozoneA highly reactive gas formed in the atmosphere – in the presence of sunlight and heat – by a complex series of photochemical reactions involving oxides of nitrogen and organic gases. National Ambient Air Quality Standards have been established for ozone. More.