Senate wins clean car race.
D000397:Air Pollution / Q000517:prevention & control*; D002248:Carbon Monoxide / Q000592:standards; D004782:Environmental Health; D006076:Government; D006838:Hydrocarbons / Q000592:standards; D007878:Legislation as Topic; D008452:Maximum Allowable Concentration; D009569:Nitric Oxide / Q000592:standards; D014481:United States; D001335:Vehicle Emissions
D006838:Hydrocarbons; D001335:Vehicle Emissions; D009569:Nitric Oxide; D002248:Carbon Monoxide