title: Regulators face questioning on particulate rules.
authors.forename: T
authors.initials: T
authors.lastname: Reichhardt
mesh_terms: D000393:Air Pollutants / Q000009:adverse effects; D000397:Air Pollution / Q000331:legislation & jurisprudence*; D004391:Dust; D006801:Humans; D010316:Particle Size; D018570:Risk Assessment; D014481:United States; D014484:United States Environmental Protection Agency
chemical_list: D000393:Air Pollutants; D004391:Dust