Smoking--a world problem.
D000293:Adolescent; D000329:Advertising; D001296:Audiovisual Aids; D002648:Child; D005060:Europe; D006266:Health Education; D006801:Humans; D007564:Japan; D012907:Smoking / Q000009:adverse effects; D000074606:Smoking Prevention; D014028:Tobacco Smoke Pollution / Q000517:prevention & control; D014481:United States
D014028:Tobacco Smoke Pollution