title: Asthma, sulfur dioxide and the clean air act.
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D001249:Asthma / Q000139:chemically induced* / Q000517:prevention & control; D006801:Humans; D007878:Legislation as Topic; D013458:Sulfur Dioxide / Q000009:adverse effects*; D014481:United States
chemical_list: D013458:Sulfur Dioxide