Environmental Defense Fund, Inc., a Nonprofit New York Corporation v. Douglas M. Costle, as Administrator, Environmental Protection Agency Appeal of American Iron and Steel Institute Natural Resources Defense Council, Inc. v. Douglas M. Costle, as Administrator, Environmental Protection Agency Appeal of American Iron and Steel Institute Natural Resources Defense Council, Inc. v. James I. Agee, as Assistant Administrator for Water and Hazardous Materials, Environmental Protection Agency Appeal of American Iron and Steel Institute Citizens for a Better Environment and Dennis L. Adamczyk v. Douglas M. Costle, as Administrator, Environmental Protection Agency Appeal of American Iron and Steel Institute

Court of Appeals for the D.C. Circuit