Alston, Chuck et al. Environment ’90: The Legislative Agenda. Washington, D.C.: Congressional Quarterly Inc.,
1990.
Baines, John. Conserving The Atmosphere. New York: Wayland Ltd., 1989.
Cozic, Charles P. Ed. Pollution: Current Controversies. San Diego: Greenhouse Press, Inc., 1994
http://www.ameritech.net/users/storm8/final.htm#figures. January 5th, 1999.
http://www.enviroweb.org/edf. January 5th, 1999.
http://epa.gov/globalwarming/. January 5th 1999.
http://www.uea.ac.uk.env.cserge/. January 5th, 1999.
Nardo, Don. Ozone. Sand Diego: Lucent Books, Inc., 1991.
Schneider, Stephen H. Global Warming. San Francisco: Sierra Club Books, 1989.