Asbestiform Fibers Nonoccupational Health Risks (1984) / Chapter Skim
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1 Introduction
1 Introduction
Pages 16-24
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From page 16... ...
There is little information about the health effects of most nonoccupational exposures to these fibers. Despite ninny epidemiological studies of workers and experimental studies on animals, questions remain about which properties of asbestos are responsible for the adverse health effects and which conditions of Ambient air is outside air to which the public is exposed (U.S.
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The millions of tons of asbestos already in place provide an ongoing potential hazard to workers and the public. The most serious health effects associated with exposure to asbestos are lung cancer, mesothelioma (an almost invariably fatal form of cancer)
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800,000 200,000 18 out 1 1 1 1 1 1 1 1 1890 ~1 J 1910 19 ~i950 1970 19 YEAR FIGURE 1-]
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CONCURRENT NATIONAL RESEARCH COUNCIL AND GOVERNMENT ACTIVITIES RELATED TO ASBESTOS While this committee carried out its task, numerous other efforts were under way to coordinate government activities and to summarize and interpret findings concerning the health effects of asbestos.
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In order to respond to its charge from EPA, the committee considered various routes of exposure, but placed emphasis on the inhalation route. To elucidate the relevant properties of the fibers responsible for the adverse health effects, it evaluated physical, epidemiological, and toxicological data related to asbestiform fibers.
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Its next step was to consider the various ways of determining the amounts of fibers both in the workplace and in the ambient environment and to evaluate epidemiological and laboratory data. Finally, it integrated data from exposure, epidemiological and laboratory studies in order to make quantitative and comparative risk assessments.
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National Academy Press, Washington, D.C. National Research Council.
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U.S. Environmental Protection Agency.
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