Book excerpt: The Elgar Encyclopedia of Environmental Law is a landmark reference work, providing definitive and comprehensive coverage of this dynamic field. Each volume probes the key elements of law, the essential concepts, and the latest research through concise, structured entries written by international experts. Each entry includes an extensive bibliography as a starting point for further reading. The mix of authoritative commentary and insightful discussion will make this an essential tool for research and teaching, as well as a valuable resource for professionals and policymakers. The unprecedented degradation of the planet's vital ecosystems and species, and the consequent damage to the variability of life on Earth, are one of the most pressing issues confronting the international community. The purpose of this volume of the Elgar Encyclopedia of Environmental Law is to provide a critical assessment of international biodiversity law in the face of the failed attempts to reduce the global trend in irreversible biodiversity loss and the need to increase efforts, including through indirect drivers of change such as institutions, governance and legal frameworks. The volume assesses comprehensively how and to what extent international law has addressed the key concerns presently facing biodiversity conservation, made recourse to conventional and market-based approaches to biodiversity conservation and sustainable use, tackled cross-cutting issues, and considered direct as well as indirect changes in socio-economic conditions. In doing so, the volume examines the historical development, principles, themes and cross cutting issues of international biodiversity law. Each article, written by an invited expert in that field, contains an overview of the topic, provides a concise review of current knowledge, identifies new directions for cutting-edge research and offers an extensive bibliography. This major research-focused resource and its in-depth exploration of the field of biodiversity law is an essential reference for university students, teachers, researchers, practitioners and policy makers. Contributors include: N. Affolder, S. Aguilar, S. Alam, R.A. Barnes, V. Barral, S.W. Burgiel, A. Cardesa-Salzmann, C. Chiarolla, A. Cliquet, N. Craik, N. de Sadeleer, L. de Silva, D. Diz, B. Ferreira de Souza Dias, A. Fodella, K. Garforth, A. Gupta, V. Jenkins, H.C. Jonas, A. Kotsakis, A. Langlais, S. Maljean-Dubois, E. Morgera, R. Moynihan, M. Ntona, A. Orsini, R. Pavoni, N. Peralta, F. Perron-Welch, D. Piselli, J. Razzaque, S. Romppanen, A. Savaresi, N. Schabus, H. Schoukens, P. Schwartz, E.J. Techera, E. Tsioumani, H. van Asselt, M. Wemaëre, C. Willmore,