RT Journal Article SR Electronic T1 Tobacco smoke in the workplace: an occupational health hazard JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1199 OP 1204 VO 131 IS 10 A1 Collishaw, N. E. A1 Kirkbride, J. A1 Wigle, D. T. YR 1984 UL http://www.cmaj.ca/content/131/10/1199.abstract AB 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.