[Harmful habit].
D000293:Adolescent; D002648:Child; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D000074606:Smoking Prevention; D013177:Sports; D014028:Tobacco Smoke Pollution / Q000517:prevention & control; D014586:USSR
D014028:Tobacco Smoke Pollution
Vrednaia privychka.