The important new 1999 Supplement to this widely-used sourcebook contains the text of 48 major treaties and other legal instruments completed between 1991 and 1998. These instruments represent the important developments in international environmental law since the 1992 UN Conference on Environment and Development. For each instrument the Supplement provides an editor's note presenting background and context for the instrument, as well as information on all annexes that are not reproduced, current status, depositary, official languages, complete reference information including parallel citations, a list of parties, popular names, and literature on each agreement.

Edith Brown Weiss is Professor International and Environmental Law at Georgetown University. Professor Magraw is Director of the International and Environmental Law Office of the U.S. Environmental Protection Agency. Paul C. Szasz is former Director of the General Legal Division, United Nations.