Nitrogen dioxide plays an important role in the atmospheric reactions that generate ozone. Home heaters and gas stoves also produce substantial amounts of NO2. The effects of short-term exposure are still unclear, but continued or frequent exposure to concentrations higher than those normally found in the ambient air may cause increased incidences of acute respiratory disease in children.
Nitrogen oxides are an important precursor to both ozone and acid rain.
In some parts of the western U.S., NOx have a significant impact on the formation of particulate matter. There currently are no localities that exceed the standard. The mission of the American Lung Association is to prevent lung disease and promote lung health. All rights reserved. Privacy Policy and Terms of Use.