title: Emissions of polynuclear hydrocarbons from automobiles and trucks.
mesh_terms: D001580:Benzopyrenes / Q000032:analysis*; D006838:Hydrocarbons / Q000032:analysis*; D014481:United States; D001335:Vehicle Emissions
chemical_list: D001580:Benzopyrenes; D006838:Hydrocarbons; D001335:Vehicle Emissions