The problem of passive smoking.
D002318:Cardiovascular Diseases / Q000209:etiology; D005260:Female; D006801:Humans; D007883:Legislation, Medical; D008175:Lung Neoplasms / Q000209:etiology; D008297:Male; D008875:Middle Aged; D012140:Respiratory Tract Diseases / Q000209:etiology; D012306:Risk; D014028:Tobacco Smoke Pollution / Q000517:prevention & control*; D014481:United States; D014691:Ventilation
D014028:Tobacco Smoke Pollution