"ENVIRONMENTAL POLICY." . . "OZONE LAYER." . . . . "NEGOTIATION." . . "ENVIRONMENTAL DEGRADATION." . . . . . . . . . . . . . . . "U.S. participation in international negotiations on ozone protocol : hearing before the Subcommittee on Human Rights and International Organizations of the Committee on Foreign Affairs, House of Representatives, One hundredth Congress, first session, March 5, 1987"@en . . . . "U.S. participation in international negotiations on ozone protocol : hearing before the Subcommittee on Human Rights and International Organizaions of the Committee on Foreign Affairs, House of Representatives, one hundredth Congress, first session, March 5, 1987"@en . . . . . . . "U.S. participation in international negotiations on ozone protocol hearing before the Subcommittee on Human Rights and International Organizations of the Committee on Foreign Affairs, House of Representatives, One hundredth Congress, first session, March 5, 1987"@en . . . . "UNITED STATES." . .