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Criteria Pollutants    At a Glance    In Depth
Nitrogen Dioxide
Nitrogen Dioxide

Ozone
Ozone

Carbon Monoxide
Carbon Monoxide

Sulfur Dioxide
Sulfur Dioxide

Particulate Matter
Particulate Matter

Lead
Lead

 

At a Glance

Nitrogen Dioxide - NO2
Nitrogen dioxide is a brown noxious gas leftover from burning fossil fuels. On sunny days, it mixes with volatile organic compounds to make ozone, a major ingredient of smog.

Source
Cars and trucks produce over 3/4ths of it. Oil refineries, power plants and industry produce the rest.

How It Hurts
Nitrogen dioxide irritates our lungs and causes bronchitis and other diseases. Nitrogen oxides also cause acid rain and snow.

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Back to Criteria Pollutants Top Level
NO2 attacks the lungs
NO2 attacks the lungs

Volatile Organic Compounds
Volatile Organic Compounds

Smog
Pollutants Add Up To Smog

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