An agency within the Department of the Interior, the National Park Service, manages nearly 400 natural, cultural and recreational sites around the country.

Part of the USDA, the NRCS helps private land owners conserve their soil, water, and other natural resources. Website contains links to technical resources, publications, programs, a plant databases and more.

The Forest Service was established in 1905 and is an agency of the U.S. Department of Agriculture. The Forest Service manages public lands in national forests and grasslands, which encompass 193 million acres.

The EPA implements environmental law, setting national standards that states and tribes enforce through their own regulations.

Forest Management Advisory Committee page of the Michigan DNR.

Community of Science -- Database of 50,000 first-person expertise descriptions. Primarily designed to identify research contacts and funding opportunities.

Ducks Unlimited is the world's largest wetland conservation organization. The major focus of this site is educational, providing information on wetland conservation, restoration, and ecology.

The GLC is a binational agency that promotes the orderly, integrated and comprehensive development, use and conservation of the water and related natural resources of the Great Lakes basin and St. Lawrence River.

Links to local Audubon chapters and other conservation and environmental websites.

Conservation organization working around the world to protect ecologically important lands and waters for nature and people.

Maps, Imagery and Publications page of the USGS.

For aerial photographs, click "programs and services," then "aerial photography."

Soil surveys by state.

Info to promote understanding of water-quality conditions and how they may vary locally, regionally, and nationally; whether they are getting better or worse over time; and how natural features and human activities affect water quality. From the USGS.

Government agency that covers the U.S. Fish & Wildlife, Service, U.S. Geological Survey, Bureau of Reclamation, National Park Service, and the Bureau of Land Management.

The EPA implements environmental law, setting national standards that states and tribes enforce through their own regulations.

From the University of California Museum of Paleontology. Description of six different earth biomes: freshwater, marine, desert, forest grassland and tundra.