This news article discusses data on Jupiter's moon Europa returned by NASA's Galileo and Voyager spacecraft and the possibility that an ocean of liquid water might exist on Europa and, with it, the possiblilty for extraterrestrial life. Full description.

This document provides an extensive description of a strategy to deliver credible predictions of future atmospheric carbon dioxide levels based on improved understanding of dynamics in the Earth's carbon reservoirs (the land, air and oceans). Full description.

Visitors can learn about the relatively new field of imaging spectroscopy, which allows specific absorption features, caused by chemical bonds in materials, to be mapped spatially. Topics include an introduction to the procedure, environmental applications, vegetation and biota mapping, lithologic, and mineral mapping. A set of links provides access to reports, accompanied by spectroscopic images, ... Full description.

This is the homepage of the U.S. Global Research Program (USGCRP), an initiative to support research on the interactions of natural and human-induced changes in the global environment and their implications for society. Visitors can study overviews of the topics of greatest interest to the USGCRP, which include atmospheric composition, climatic variability and change, global cycles for carbon and ... Full description.

This site provides statistics and information on the worldwide supply of, demand for, and flow of minerals and materials essential to the U.S. economy and to national security. The database is searchable by commodity, country, state, or keyword. Links to a variety of related topics and publications are included. Full description.

Users can access an extensive array of information on coral reefs. Materials presented here include information on reefs in 131 countries, maps and photos, data on coral bleaching, an online mapping system, a bibliography of reef-related references, and downloadable datasets. Full description.