title: Varieties of smoke.
mesh_terms: D006801:Humans; D009538:Nicotine / Q000032:analysis; D010947:Plants, Toxic; D012907:Smoking; D000074606:Smoking Prevention; D013638:Tars / Q000032:analysis; D014026:Nicotiana / Q000032:analysis
chemical_list: D013638:Tars; D009538:Nicotine