Fuel factors in automotive tailpipe emissions.
D000397:Air Pollution / Q000517:prevention & control; D002248:Carbon Monoxide / Q000032:analysis; D005579:Fossil Fuels / Q000032:analysis*; D006838:Hydrocarbons / Q000032:analysis; D009589:Nitrogen Oxides / Q000032:analysis; D001335:Vehicle Emissions / Q000032:analysis*
D005579:Fossil Fuels; D006838:Hydrocarbons; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D002248:Carbon Monoxide