title: Utilities choke on asthma research.
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D001249:Asthma / Q000139:chemically induced*; D006077:Government Agencies; D006801:Humans; D007221:Industry; D007878:Legislation as Topic; D013458:Sulfur Dioxide / Q000009:adverse effects; D014481:United States
chemical_list: D013458:Sulfur Dioxide