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There is no evidence that air pollution causes asthma, but it can trigger attacks in people who have asthma.
- Significant outdoor air pollutants for people with asthma are: airborne particles, sulphur dioxide, nitrogen dioxide and ozone.
- People with asthma in urban areas can be advised to remain indoors on smoggy days and, if outdoors, to avoid heavy exertion.
- Significant indoor air pollutants for people with asthma are: environmental tobacco smoke, formaldehyde, nitrogen dioxide and volatile organic compounds.
- Smoking by either parent – particularly by the mother – increases the risk of asthma in children. Doctor-diagnosed asthma is more common among non-smoking adults exposed to environmental tobacco smoke than those who are not exposed.
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People with asthma should avoid smoking and exposure to environmental tobacco smoke indoors and in confined spaces such as cars.
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Content Updated March 2005
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Last Updated ( Thursday, 19 February 2009 )
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