Columbia Earthscape http://www.earthscape.org/
A resource that aims to select a wide range of topics to be made available for researchers, teachers, students, and decision makers involved in the field. Composed of four main areas: research, education, Earth Affairs Magazine, and links.
Environmental Links http://jrscience.wcp.muohio.edu/html/index.html
Personal web page of Miami University faculty member, with extensive collection of internet links on tropical ecology, weather phenomena, marine ecology, paleobiology, science pedagogy, nature photography, and related topics.
GeoIndex http://www.geoindex.com/geoindex/
Internet directory of companies, associations, government, and education sites for the environmental, geology, geotechnical, hydrogeology, mining, and petroleum fields.