title: Transportation spending plan could weaken U.S. clean air rules.
authors.forename: Kris
authors.initials: K
authors.lastname: Christen
mesh_terms: D000397:Air Pollution / Q000517:prevention & control*; D004777:Environment; D019983:Guideline Adherence; D006801:Humans; D007221:Industry; D011050:Policy Making; D013219:State Government; D014186:Transportation / Q000191:economics*; D014481:United States; D001335:Vehicle Emissions
chemical_list: D001335:Vehicle Emissions