-- Robert Preidt
TUESDAY, Oct. 16 (HealthDay News) -- Smoking in cars produces
levels of harmful particulate pollutants that are far above World
Health Organization indoor air standards and likely pose a threat
to children's health, a new study reveals.
Dangerous levels of particulate air pollution occur even when
the windows are open or the air conditioning is on, according to
the findings released Oct. 15 in the journal
For the study, researchers in the United Kingdom measured fine
particulate matter every minute in the rear passenger seat of cars
driven by 14 smokers and three nonsmokers. The journeys lasted from
five to 70 minutes, with an average duration of 27 minutes. Of the
83 journeys, 34 were smoke-free.
Particulate matter levels averaged 7.4 micrograms per cubic
meter of air (mcg/m3) during smoke-free drives, but were around 11
times as high (85 mcg/m3) during drives where smoking occurred.
Particulate matter levels were strongly associated with the number
of cigarettes smoked, with average levels peaking at 385 mcg/m3.
The highest recorded level was 880 mcg/m3.
Even though smokers usually opened the car windows to provide
ventilation, at some point during the drives where smoking
occurred, particulate matter levels were still higher than the safe
limit of 25 mcg/m3 recommended by the World Health Organization,
the investigators found.
Children's health problems, including sudden infant death,
middle ear disease, wheeze and asthma have all been linked to
secondhand smoke exposure, the researchers noted in a journal news
"Children are likely to be at greater risk from [secondhand smoke] exposure due to their faster breathing rates, less developed immune system and their inability to move away from the source in many home and car settings," wrote Dr. Sean Semple, of the Scottish Centre for Indoor Air at the University of Aberdeen in Scotland, and colleagues.
The U.S. Centers for Disease Control and Prevention has more
secondhand smoke exposure.
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