The Global Change Master Directory, Goddard Space Flight Center
A comprehensive directory of information about Earth science data, including broad coverage of the oceans, atmosphere, hydrosphere, solid earth, biosphere and human dimensions of global change.
http://gcmd.gsfc.nasa.gov/

International Geosphere-Biosphere Programme
Programme is focused on acquiring basic scientific knowledge about the interactive processes of biology and chemistry of the earth as they relate to Global Change.
http://www.igbp.kva.se/

GeoRef Information System
Bibliographic database of geoscience literature.
http://www.georef.org/

E-Theater
NASA Goddard Space Flight Center, Visualization Analysis Lab, E-Theater offers presentations of the latest Earth Science Discoveries on a portable large format, or IMAX screen.
http://rsd.gsfc.nasa.gov/rsd/ETheater/

Earth Science Australia
Earth science resources, images, freeware for students and teachers as well as general information about earth science in Australia.
http://earthsci.org/

NASA - Earth Science Division
Research center focusing on ecosystem science technology, atmospheric physics and chemistry, and airborne sensors. Includes list of research projects, discoveries, education outreach efforts, news, seminars, and publications.
http://geo.arc.nasa.gov/

Geo-Glossary Online
Contains equivalent geological and geographical terms in four languages (German, English, Norwegian and Dutch).
http://www.geowoerterbuch.com/index_en.php

National Research Council (U.S.) Commission on Geosciences, Environment, and Resources
Scope includes atmospheric sciences, climate, oceanography, solid-earth sciences, radioactive waste management, polar research, environmental science and toxicology, natural disasters, and water science. Commission reports cover scientific/technical aspects of public policy issues in these areas.
http://dels.nas.edu/