This is the 17th publications in a Technical Report Series that regroups the Guidelines, Overviews, Technical Reviews, and Workshop Proceedings previously published by UNEP IE/PAC. The regrouping into a single series will ensure a greater cohesion among future publications, and allows a single document to include the various elements of IE/PAC work that had earlier been presented separately. As before, the Technical Report Series aims to meet the needs of a wide range of government officials, industry managers, and environmental protection associations, by providing information on the issues and methods of environmental management relevant to various industrial sectors.