TY - BOOK ED - United Nations. Economic Commission for Europe. TI - The state of transboundary air pollution : : 1992 update : report p repared within the framework of the Convention on Long-range Transbound ary Air Pollution SN - 9211165741 PY - 1993/// CY - New York : PB - United Nations, KW - Air KW - Pollution KW - Transboundary pollution KW - Sulphur KW - Environmental aspects KW - Trees KW - Effect of air pollution on KW - Europe KW - Forest conservation N1 - At head of title: Economic Commission for Europe; "ECE/EB.AIR/34."; "United Nations publication sales no. E.93.II.E.25"--t.p. verso; Includes bibliographical references; Strategies and policies for air pollution abatement: 1992 review -- Results from integrated assessment modelling analysis of sulphur abatem ent strategies -- The 1992 report on forest condition in Europe: execut ive summary ER -