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Tuesday, 03 June 2008,
Written by Trouni
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| Characteristics |
Main sources |
Effects on health |
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Highly
reactive, unstable form of oxygen and one of the irritant pollutants in photochemical
smog.
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Formed
by chemical reactions between VOC and NO2.
Ozone
is also produced by some ionizers.
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Damages the cells that line the respiratory tract,
causing:
- irritation
- burning
- breathing difficulty
- acute respiratory
problems
Also causes impairment of the immune system and a temporary
decrease in lung capacity of 15 to 20 percent.
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About ozone (O3)
Ozone is a highly reactive, unstable form of oxygen that is not emitted
directly from any man-made source. It is formed by a complicated series
of chemical reactions initiated by the sunlight, in particular by the
action of sunlight on nitrogen oxides, reactive hydrocarbons and
volatile organic compounds; which are all mainly emitted by motor
vehicles and industrial sources. As these chemical reactions can take
hours, wind can spread ozone to places were no pollution sources can be observed.
Impact of O3 and VOCs on your health
Ozone damages the cells that line the respiratory tract, causing
irritation, burning, and breathing difficulty, which can furthermore
lead to increased symptoms of those suffering from lung diseases and
asthma. Even at very low levels, the respiration of ozone can cause
acute respiratory problems and impair the immune system, making people
more susceptible to respiratory illness. According to EPA , ozone
exposure can even cause temporary decreases in lung capacity of 15 to
20 percent in healthy adults and is the reason for more than 10 percent
of all summertime respiratory-related hospital visits.
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