499 U.S. 187 499 U.S. 187 111 S.Ct. 1196 113 L.Ed.2d 158 INTERNATIONAL UNION, UNITED AUTOMOBILE, AEROSPACE AND AGRICULTURAL IMPLEMENT WORKERS OF AMERICA, UAW, et al., Petitionersv.JOHNSON CONTROLS, INC. No. 89-1215. Argued Oct. 10, 1990. Decided March 20, 1991. Syllabus A primary ingredient in respondent’s battery manufacturing process is lead, occupational exposure to which entails […]