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Website of the Geological Survey Bureau of the Iowa Department of Natural Resources, including a Geologic Sample Database (GEOSAM)with geologic information for 35,000 locations in Iowa.

A comprehensive directory of information about Earth science data, including a broad coverage of the oceans, atmosphere, hydrosphere, solid earth, biosphere and human dimensions of global change.

A non-profit, scientific and educational organization of professional conservationists.

Provides links to conservation service offices in Fort Worth, Texas.

Includes information on water use, with both historical and current data.

The U.S. Geological Survey's Global Change Research Program is an international source for ground-based and remotely sensed earth science data and information used by global change researchers and contributing to assessments of the potential effects of global change on society.