title: Visibility and soiling: a comparison of the effects of leaded and unleaded gasolines.
abstract: The emissions from a fleet of late-model cars fueled with commercial, high-aromatic, unleaded gasoline caused nearly twice as much atmospheric light extinction as those from a matched fleet fueled with commercial, low-aromatic, leaded gasoline, when both were driven according to a consumer operating cycle in an idle traffic tunnel. The increased extinction and greater soiling potential result mainly from greater light absorption by the air-suspended particles from the unleaded fleet.
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D002244:Carbon / Q000032:analysis*; D002248:Carbon Monoxide / Q000032:analysis; D007854:Lead / Q000032:analysis*; D008027:Light; D010578:Petroleum / Q000032:analysis*; D010783:Photometry; D012542:Scattering, Radiation; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D010578:Petroleum; D001335:Vehicle Emissions; D007854:Lead; D002244:Carbon; D002248:Carbon Monoxide