title: Ruling on cleaner diesel leaves Republicans facing a dilemma.
authors.forename: T
authors.initials: T
authors.lastname: Reichhardt
mesh_terms: D000397:Air Pollution; D004777:Environment; D011057:Politics; D014481:United States; D014484:United States Environmental Protection Agency; D001335:Vehicle Emissions / Q000331:legislation & jurisprudence*
chemical_list: D001335:Vehicle Emissions