Central Oklahoma Clean Cities
- Works to encourage practices that contribute to the reduction of petroleum consumption in the transportation sector.
- http://www.okcleancities.com/

Oklahoma Prairie Country
- Information about the northeastern Oklahoma prairie, grasses, wildflowers, Osage Indians, nature conservation, the American bison and western history. Also included is information about The Nature Conservancy, and The Tallgrass Prairie Preserve.
- http://www.okprairie.com/

Oklahoma Geological Survey
- Conducts research and education on the state's geology and mineral resources. Geologic maps; earthquake data; information on oil, gas, and coal in the state; publications information; and resources for rockhounds.
- http://www.ogs.ou.edu/

Oklahoma Geological Survey Observatory
- Seismic observing station in rural Tulsa County which records, identifies, and locates earthquakes worldwide. Facility information, Oklahoma earthquake catalog, other seismicity information, and links to related sites.
- http://www.okgeosurvey1.gov/

Oklahoma Biological Survey
- Conducts research on the state's animal and plant communities. Information about natural areas, inventories of the state's flora and fauna, rare species database, summaries of current research, publications lists, and educational materials.
- http://www.biosurvey.ou.edu/

The Metropolitan Environmental Trust
- Encourages and promotes recycling in the Tulsa metropolitan area, operates recycling depots, and holds semi-annual household pollutant collection events. Information about programs.
- http://www.metrecycle.com

Birds of Prey in Oklahoma
- A student science project.
- http://www.tulsawalk.com/birding/