Tropospheric ozone : respiratory effects and Australian air quality goals.
To review the health effects of tropospheric ozone and discuss the implications for public health policy.
Literature review and consultation with scientists in Australia and overseas.
Papers in English or with English language abstracts were identified by Medline search from the international peer reviewed published reports.
Exposure to ozone at concentrations below the current Australian air quality goal (0.12 ppm averaged over one hour) may cause impaired respiratory function.
Inflammatory changes in the small airways and respiratory symptoms result from moderate to heavy exercise in the presence of ozone at levels of 0.08-0.12 ppm.
The changes in respiratory function due to ozone are short lived, vary with the duration of exposure, may be modified by levels of other pollutants (such as sulphur dioxide and particulates), and differ appreciably between individuals.
Bronchial lavage studies indicate that inflammation and other pathological changes may occur in the airways before reductions in air flow are detectable, and persist after respiratory function has returned to normal.
It is not known whether exposures to ozone at low levels (0.08-0.12ppm) cause lasting damage to the lung or, if such damage does occur, whether it is functionally significant.
A new one hour air quality ozone goal of 0.08 ppm for Australia, and the introduction of a four hour goal of 0.06 ppm are recommended on health grounds.
Mots-clés Pascal : Ozone, Pollution air, Toxicité, Appareil respiratoire pathologie, Homme, Qualité air, Contrôle qualité, Australie, Océanie, Gaz
Mots-clés Pascal anglais : Ozone, Air pollution, Toxicity, Respiratory disease, Human, Air quality, Quality control, Australia, Oceania, Gases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0479829
Code Inist : 002B03M02. Création : 01/03/1996.