Collishaw N E, Kirkbride J, Wigle D T
Can Med Assoc J. 1984 Nov 15;131(10):1199-204.
Tobacco smoke, which contains over 50 known carcinogens and many other toxic agents, is a health hazard for nonsmokers who are regularly exposed to it while at work. Involuntary exposure to tobacco smoke annoys and irritates many healthy nonsmokers. Serious acute health effects are probably limited to the one fifth of the population with pre-existing health conditions that are aggravated by exposure to tobacco smoke. The consequences of long-term exposure include decreased lung function and lung cancer. Existing air quality standards for workplaces do not directly specify an acceptable level for tobacco smoke. The evidence on the composition of tobacco smoke and on the health hazards of involuntary exposure suggests that there may not be a "safe" level for such exposure.
烟草烟雾含有50多种已知致癌物和许多其他有毒物质，对于在工作中经常接触到它的非吸烟者来说，是一种健康危害。非自愿接触烟草烟雾会使许多健康的非吸烟者感到烦恼和不适。严重的急性健康影响可能仅限于五分之一已有健康问题且因接触烟草烟雾而病情加重的人群。长期接触的后果包括肺功能下降和肺癌。现有的工作场所空气质量标准并未直接规定烟草烟雾的可接受水平。关于烟草烟雾成分以及非自愿接触对健康危害的证据表明，这种接触可能不存在“安全”水平。
