title: Contribution of urban runoff to hydrocarbon pollution.
mesh_terms: D006838:Hydrocarbons / Q000032:analysis*; D010414:Pennsylvania; D012722:Sewage / Q000032:analysis*; D014507:Urbanization; D014877:Water Pollution, Chemical / Q000032:analysis*
chemical_list: D006838:Hydrocarbons; D012722:Sewage