There are hundreds of web sites on environmental issues. The one's listed here bring either a unique focus, a long commitment to environmental issues or an amalgam of both. In choosing sites, be skeptical. Look at who is behind the site.
Environmental research is by necessity interdisciplinary.
While I have tried to categorize the information and resources here, the categories are without firm borders. I will attempt to create links back and forth. Please send suggestions to me. Some are limited only to faculty and staff others are more widely accessible.