title: Burning used oil tagged as top source of airborne lead emissions.
mesh_terms: D000397:Air Pollution / Q000032:analysis* / Q000331:legislation & jurisprudence; D002140:California; D007854:Lead / Q000032:analysis*; D010578:Petroleum / Q000032:analysis*; D014481:United States
chemical_list: D010578:Petroleum; D007854:Lead