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- USGS -- Water Resources of the United States: Home page for water resources information from the U.S. Geological Survey. Topics include ground water, surface water, water use, water quality, acid rain, toxic substances hydrology
- USGS Geomagnetism Homepage: Provides background information on the earth's magnetism, geomagnetic field maps and data, and modelling information
- USGS National Geologic Map Database: Searchable catalog of paper and digital geologic maps, mostly for the U.S. Maps and related data cover: geology, hazards, earth resources, geophysics, geochemistry, geochronology, paleontology, and marine geology
- South Florida Information Access: Discusses research by the US Geological Survey's South Florida Ecosystem Program. Includes studies of hydrology, cycling of mercury contamination, coastal wetlands , and other areas of environmental concern
- Midcontinent Ecological Science Center: US government center researching and developing technologies to understand and manage biological systems. Also inventory and monitor to assess biological status and trends. Fort Collins, Colorado
- FRESC - Forest and Rangeland Ecosystem Science Center: A multi-disciplinary research center within the USGS Biological Resources Division. Provides scientific understanding and technology to support sound management and conservation of forest and rangeland ecosystems in the U.S. Pa
- Biological Resources Division - USGS: Providing the scientific understanding and technologies needed to support sound management and conservation of our Nation's biological resources National Biological Information Infrastructure
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