From the Centers for Disease Control and Prevention. State-specific prevalence of current cigarette smoking among adults and the proportion of adults who work in a smoke-free environment--United States, 1999.
D000328:Adult; D006801:Humans; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology*; D000074606:Smoking Prevention; D014028:Tobacco Smoke Pollution / Q000517:prevention & control*; D014481:United States / Q000453:epidemiology; D017132:Workplace / Q000331:legislation & jurisprudence / Q000706:statistics & numerical data
D014028:Tobacco Smoke Pollution