Some sources that can help you get started are:
Barry, John and E. Gene Frankland. International Encyclopedia of Environmental Politics. Oxford, London: Routledge, 2002. (Firestone Noncirculating) GE170.I55 2002
Bromley, Daniel W. Handbook of environmental economics. Oxford, UK: Blackwell, 1995. (DR) HC79.E5 H3285 1995
Glossary of environment statistics. New York: United Nations, 1999.
Grafton, R. Quentin. Harry W. Nelson, N. Ross Lambie, and Paul R. Wyrwoll. Dictionary of climate change and the environment: economics, science and policy. Cheltenham, UK: Edward Elgar, c2012.
Markandya, Anil. Dictionary of environmental economics. London: Earthscan Publications, 2001.
van den Bergh, Jeroen C.J.M. Handbook of environmental and resource economics. Cheltenham, UK: Edward Elgar, 1999. (DR) HC79.E5 H3284 1999