are considered in Chapters 4 through 8, including physical effects, questionnaires, and biological markers. Chapters 9 through 15 review epidemiologic studies of possible health effects of these exposures. The health consequences examined range from irritation and allergic reactions to cancer and cardiovascular disease. Only studies that assess exposures under experimental conditions or in the home are included. ETS potentially interacts with constituents of the ambient air. This makes the evaluation of possible health effects due to workplace exposure complex and specific to each situation because of the varying nature of contaminants. Each chapter concludes with a summary of what is currently known, the strength of that knowledge, and what additional information would further clarify the relationship of ETS and possible health effects. Some recommendations for additional research are also given.

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