Getting the lead out.
D000328:Adult; D000397:Air Pollution / Q000032:analysis / Q000517:prevention & control*; D000818:Animals; D002648:Child; D006801:Humans; D007854:Lead / Q000032:analysis; D007855:Lead Poisoning / Q000517:prevention & control*; D010578:Petroleum / Q000032:analysis; D014481:United States
D010578:Petroleum; D007854:Lead