tailieunhanh - AIR POLLUTION STUDIES No. 15: EMISSION REPORTING GUIDELINES

It is not yet clear how exposure to low ambient concentrations of particulates might produce the health effects observed in epidemiological studies and whether certain attributes of particles may be more closely associated to these health effects. The characteristics of particles that are being investigated for their roles in causing health effects include metal content, particle size, and particles as carriers of other toxic compounds (such as gases or biological toxins from bacteria and pollens etc.). Transition metals (such as Fe, Cu, Co, Mn) have been hypothesised to be associated with health effects, because they can cause the. | ECONOMIC COMMISSION FOR EUROPE AIR POLLUTION STUDIES No. 15 UNITED NATIONS ECONOMIC COMMISSION FOR EUROPE Geneva AIR POLLUTION STUDIES No. 15 Guidelines for Estimating and Reporting Emission Data under the Convention on Long-range Transboundary Air Pollution Prepared by the Convention s Task Force on Emission Inventories and Projections and the secretariat UNITED NATIONS New York and Geneva 2003 NOTE Symbols of United Nations documents are composed of capital letters combined with figures. Mention of such symbols indicates a reference to a United Nations document. The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the United Nations concerning the legal status of any country territory city or area or of its authorities or concerning the delimitation of its frontiers or boundaries. In United Nations texts the term ton refers to metric tons 1 000 kg or 2 lbs . ECE 80 UNITED NATIONS PUBLICATION _Sales No. ISSN 1014-4625 _ISBN 92-1-116861-9__ Copyright United Nations 2003 All rights reserved UNECE Information Service Palais des Nations CH-1211 Geneva 10 Switzerland Phone 41 0 22 917 44 44 Fax 41 0 22 917 05 05 E-mail Web site http