The purpose of a smog check is to reduce air pollution from vehicles
by ensuring that cars with excessive emissions are repaired in
accordance with federal and state guidelines.
Smog is created when hydrocarbon and nitrogen oxides gases are
exposed to natural sunlight. The five gasses monitored during a smog check are
Oxygen, Carbon Dioxide, Nitrogen Oxides, Carbon
Monoxide, and Hydrocarbons.
California has the worst air quality in the nation and they have been the leaders
in in getting control and cleaning up their air polution.
The current control programs for motor vehicles cost $12 billion per year.
Smog has had a negative and devistating impact on human lives.
In 1998 the Air Resource Board deamed diesel particulate matter
as a cancer causing agent. Research has also found that smog causes life-shortening
due to related cancer , asthma, heart problems, and
Several studies have found that smog can cause many human ailments
including pneumonia, asthma, bronchitis, and lung cancer. The study of over 3,000 children
showed those living in high-smog areas were more likely to develop asthma if they
were avid athletes, when compared to children who did not participate
In addition to all the directly related health reasons, it should also
be noted that carbon dioxide is a greenhouse gas that is associated
with globalwarming. Smog Checking vehicles is a way to significantly reduce
the amount of CO2 emissions and thus limit vehicles impact on global warming.