Knoxville's Downtown Trees
- Publicizes tree-planting and protection ideas and actions in the city. Includes information about tree ordinances, tree board, and urban forestry.
- http://www.downtowntrees.com

Keep Knoxville Beautiful, Inc.
- Litter prevention information, local cleanup and beautification initiatives, annual "orchid and onion" awards, and links to related sites.
- http://www.discoveret.org/keepknox/

Foundation for Global Sustainability
- Advocacy and activist organization which monitors and addresses social and environmental issues in the Upper Tennessee Valley and the Southern Appalachian Mountains.
- http://www.discoveret.org/fgs/

Knoxville Recycling Coalition
- information on where and how and why to recycle in and around Knoxville, Tennessee. Also home of the Knoxville Waste Exchange.
- http://www.discoveret.org/recycle/

Harvey Broome Group - Sierra Club
- Knoxville chapter of the conservation organization. Site has current organization information and links to related groups.
- http://tennessee.sierraclub.org/broome/

Knoxville, Tennessee, Recycling
- Drop-off recycling locations in the City of Knoxville.
- http://www.ci.knoxville.tn.us/solidwaste/recycle.asp

Knox County Department of Air Quality Management
- Includes local air quality information updated hourly, plus data for the previous day and recent weeks.
- http://aqm.co.knox.tn.us/

Ijams Nature Center
- 80-acre park located in Knoxville, encompassing woods, trails, meadows, a spring-fed pond and informal perennial gardens. Offers opportunities to learn about ecology and the environment or just relax and enjoy nature.
- http://www.ijams.org/