The first and second editions of the UNEP EIA Training Resource Manual is the result of cooperation among a number of organisations and individual experts committed to supporting environmental assessment as a major part of capacity building for sustainable development. The preliminary version of this edition, published in 1996, underwent a series of formal trials in Uganda, Hungary, Viet Nam, and Tegucigalpa. The results of the trials and updates, as well as feedback from various sources, were used in preparing the second edition. The UNEP Environmental Impact Assessment (EIA) Training Resource Manual, Second Edition, has been updated to reflect the developments in EIA law, process and practice that have occurred since the preliminary version was published in 1996. The Manual is a tool to assist trainers in preparing and delivering training courses that provide an understanding of, and basic proficiency in, the application of EIA.