title: EPA proposes tighter particulate air pollution standards.
authors.forename: Bob
authors.initials: B
authors.lastname: Weinhold
mesh_terms: D004784:Environmental Monitoring / Q000191:economics / Q000331:legislation & jurisprudence / Q000592:standards; D058735:Environmental Policy / Q000191:economics / Q000331:legislation & jurisprudence; D033161:Government Regulation; D010316:Particle Size; D052638:Particulate Matter / Q000032:analysis / Q000592:standards*; D014481:United States; D014484:United States Environmental Protection Agency / Q000331:legislation & jurisprudence*
chemical_list: D052638:Particulate Matter