Regions at Risk: Comparisons of Threatened Environments Nine critical environmental regions are examined through formal definitions and a detailed look into the concepts of environmental criticality and endangerment. This innovative study provides an up-to-date synthesis of vast amounts of here-to-fore inaccessible data. Book Ordering Information:    Sales Number: E. 96.III.A.1     ISBN: 92-808-0848-6     Pages: 600pp.      Price: $38.00 [Environment Main] [Subject Index] [Alphabetical Index] [UN Publications Policies] Copyright © 1997 United Nations