University of Guelph
Canada's Polar Environments
This site is a set of images along with volumes of information make this site a treasure trove. The site has satellite images.
Government of Canada
Government of Canada: Environment: Ecosystem Initiatives
This resource provides information on ecosystem initiatives and the programs in Canada that are working to preserve area ecosystems.
American Institute of Biological Sciences
Action Bioscience: Issues in Environment
This site from American Institute of Biological Sciences provides a collection of articles on current issues in environmental science and human impacts on the environment. Several articles available in Spanish.
Other
Open2.net: Ecosphere
Designed by the Open University and the BBC, this website from Open2.net explores ecosystems. Included is a lengthy discussion on closed ecosystems and their importance to research, as well as a virtual ecosystem, an interactive showcase...