The Protocol to the 1979 Convention on Long-Range Transboundary Air Pollution on the Reduction of Sulphur Emissions or their Transboundary Fluxes by at least 30 per cent is a 1985 protocol to the Convention on Long-Range Transboundary Air Pollution agreement that provided for a 30 per cent reduction in sulphur emissions or transboundary fluxes by 1993. The protocol has been supplemented by the 1994 Oslo Protocol on Further Reduction of Sulphur Emissions. By 1993, most of the countries that participated in the agreement reported reaching the goal and some countries reported even greater sulphur reductions. opened for signature - July 8, 1985 entered into force - September 2, 1987 parties - (25) Albania, Austria, Belarus, Belgium, Bulgaria, Canada, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Italy, Liechtenstein, Lithuania, Luxembourg, Netherlands, North Macedonia, Norway, Russia, Slovakia, Sweden, Switzerland, Ukraine See also United Nations Interim Force in Lebanon References External links "1985 Helsinki Protocol on the Reduction of Sulphur Emissions or their Transboundary Fluxes by at least 30 per cent", unece.org. Text. Signatures and ratifications. Environmental treaties Sulfur Treaties concluded in 1985 Treaties entered into force in 1987 1985 in Finland 1987 in the environment Treaties of Albania Treaties of Austria Treaties of the Byelorussian Soviet Socialist Republic Treaties of Belgium Treaties of the People's Republic of Bulgaria Treaties of Canada Treaties of the Czech Republic Treaties of Czechoslovakia Treaties of Denmark Treaties of Estonia Treaties of Finland Treaties of France Treaties of West Germany Treaties of East Germany Treaties of the Hungarian People's Republic Treaties of Italy Treaties of Liechtenstein Treaties of Lithuania Treaties of Luxembourg Treaties of North Macedonia Treaties of the Netherlands Treaties of Norway Treaties of the Soviet Union Treaties of Slovakia Treaties of Sweden Treaties of Switzerland Treaties of the Ukrainian Soviet Socialist Republic Air pollution Waste treaties Convention on Long-Range Transboundary Air Pollution Treaties extended to the Faroe Islands Treaties extended to Greenland Treaties extended to West Berlin United Nations Economic Commission for Europe treaties