Health Effects of Nitrogen Dioxide (NO2)

Nitrogen dioxide (NO2) can irritate the lungs and lower resistance to respiratory infection such as influenza. Individuals with respiratory problems, such as asthma, are more susceptible to the effects. In young children, nitrogen dioxide may also impair lung development. Studies suggest that chronic exposure to nitrogen dioxide may lead to structural changes in the lungs, however, specific levels and exposure duration likely to cause such effects have not yet been determined.