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By John Brennan
Some companies and websites market devices
called ozone machines or ozone generators by claiming that ozone is beneficial
for human health or reduces indoor air pollution.
There is no evidence to support these claims; in
fact, the available evidence tends to indicate exactly the opposite, that high
concentrations of ozone are dangerous for you.
At least one couple has been sentenced to jail
by a district court for marketing these devices as a treatment for a medical
condition.
Ozone
Each molecule of oxygen gas that you breathe
contains two atoms of the element oxygen.
Each molecule of ozone gas, by contrast,
contains three atoms of oxygen. This combination is unstable and tends to react
with a variety of carbon-based compounds.
This high level of reactivity makes ozone very
good at destroying germs during water treatment.
Unfortunately, it also makes it dangerous to
human health, since the ozone can react with molecules in your lungs in much the
same way.
Regulations
The U.S. Food and Drug Administration and the
Code of Federal Regulations regard ozone as toxic and without any demonstrated
medical use.
According to the FDA, the concentrations of
ozone you would need to kill bacteria and viruses are high enough they would
also harm humans and other animals.
Machines intended for household, office or
health care center use that generate ozone at levels over 0.05 parts per
million or are marketed using claims that they have medical benefits are banned
by federal regulations.
Hazards
When ozone reacts with molecules lining the
interior of your lungs, it irritates the mucus membrane and can cause fluid to
leak into the lungs -- a condition called pulmonary edema.
Symptoms include chest pain, shortness of breath
and coughing.
Some people are more susceptible than others;
people with respiratory system disorders like asthma are at especially high
risk.
The Environmental Protection Agency has found
that some of the devices currently on the market can generate enough ozone to
drive concentrations in your home up above safe levels.
Considerations
There is no need or reason to install an
ozone-producing device in your home.
Many manufacturers of these devices claim that
ozone can remove pollutants or germs or benefit human health in some way.
There is no evidence to support these claims; in
fact, the concentrations of ozone required to get rid of germs and pollutants
are easily far more than enough to harm you and your family.
You should be wary of manufacturers or websites
that make these kinds of claims.
Based
in San Diego, John Brennan has been writing about science and the
environment since 2006. His articles have appeared in "Plenty,"
"San Diego Reader," "Santa Barbara Independent" and
"East Bay Monthly." Brennan holds a Bachelor of Science in biology from
the University of California, San Diego.
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