1. World Watch Institute: the homepage for the Worldwatch Institute, an organization that conducts a broad range of research on environmental issues. They publish an annual "State of the World" report that presents detailed analyses of current environmental issues.
2. National Council for Science and the Environment: the web site for the National Council for Science and the Environment with links to various sites with state, national, and international data on environmental quality.
3. E Magazine: website for EThe Environmental Magazine. The site includes many archived articles on all environmental topics.
4. Global Environment Outlook-1: website for the Global Environment Outlook-1, a United Nations publication. The report is an extensive analysis of the global environmental situation.