A cancerous epidemic.
Riddle
S G
SG
D000293:Adolescent; D000294:Adolescent Behavior; D003756:Dental Hygienists; D006267:Health Education, Dental; D006801:Humans; D009062:Mouth Neoplasms / Q000209:etiology; D009538:Nicotine / Q000009:adverse effects; D010947:Plants, Toxic; D011369:Professional-Patient Relations; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology; D000074606:Smoking Prevention; D014030:Tobacco, Smokeless / Q000009:adverse effects; D014481:United States / Q000453:epidemiology
D009538:Nicotine