Nitrogen Dioxide

The two most prevalent oxides of nitrogen are nitrogen dioxide (NO₂) and nitric oxide (NO). Both are toxic gases with NO₂ being a highly reactive oxidant and corrosive.  The primary sources indoors are combustion processes, such as unvented combustion appliances, e.g. gas stoves, vented appliances with defective installations, welding, and tobacco smoke.

See Also: http://www.epa.gov/iaq/no2.html

Tagged as: Air elements, air pollutants, Dangerous, Facts, Particles