
    No. 82-1005.
    No. 82-1247.
    No. 82-1591.
    Chevron U.S.A. Inc. v. Natural Resources Defense Council, Inc., et al.; American Iron & Steel Institute et al. v. Natural Resources Defense Council, Inc., et al.; and Ruckelshaus, Administrator, Environmental Protection Agency v. Natural Resources Defense Council, Inc., et al.
   C. A. D. C. Cir. Motion of Mid-America Legal Foundation for leave to file a brief as amicus curiae granted. Certiorari granted, cases consolidated, and a total of one hour allotted for oral argument. Reported below: 222 U. S. App. D. C. 268, 685 F. 2d 718.  