title: Clean indoor air regs in effect in 15 counties.
mesh_terms: D016902:Air Pollution, Indoor / Q000331:legislation & jurisprudence* / Q000517:prevention & control; D006801:Humans; D014028:Tobacco Smoke Pollution / Q000331:legislation & jurisprudence* / Q000517:prevention & control; D014903:West Virginia
chemical_list: D014028:Tobacco Smoke Pollution