title: Teen smoking up one third.
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D010947:Plants, Toxic; D015995:Prevalence; D012907:Smoking / Q000453:epidemiology* / Q000208:ethnology; D014030:Tobacco, Smokeless; D014481:United States / Q000453:epidemiology