title: USA: continuing battles over "acceptable" air quality standards.
authors.forename: David
authors.initials: D
authors.lastname: Simpson
authors.forename: Stella Aguinaga
authors.initials: SA
authors.lastname: Bialous
mesh_terms: D000388:Air / Q000592:standards*; D000393:Air Pollutants / Q000009:adverse effects; D006293:Health Promotion; D006801:Humans; D000074606:Smoking Prevention; D014481:United States
chemical_list: D000393:Air Pollutants