Lead in petrol and elsewhere.
D006801:Humans; D007854:Lead / Q000032:analysis*; D007855:Lead Poisoning / Q000517:prevention & control*; D010578:Petroleum / Q000032:analysis*; D013756:Tetraethyl Lead / Q000506:poisoning
D010578:Petroleum; D013756:Tetraethyl Lead; D007854:Lead