Embarras Volunteer Stewards
- Volunteer group committed to preserving East Central Illinois natural heritage. Information on tours, workdays, and descriptions of sites.
- http://www.embarrasstewards.org/

Earth Share of Illinois
- Promotes charitable giving in government and corporate employee payroll deduction workplace giving campaigns to financially support member organizations. Features a listing of member organizations and methods to provide funding. Part of Earth Share, a nat
- http://www.earthshare-illinois.org/

Sierra Club of Illinois
- Working to explore, enjoy, and protect the Illinois environment.
- http://illinois.sierraclub.org/

Illinois Recycling Association
- A collective voice for recycling on critical waste management issues facing the state. News, events, facts, and resources.
- http://www.illinoisrecycles.org/

Illinois Clean Energy Community Foundation
- Invests in clean energy development and land preservation efforts, working with communities and citizens to improve environmental quality. Program overview, trustees, FAQs, application form, and announcements are featured.
- http://www.illinoiscleanenergy.org/

Nature Conservancy, The: Illinois Chapter
- Conservation group that provides protection and education about the state's natural lands.
- http://nature.org/wherewework/northamerica/states/illinois/

Illinois Audubon Society
- An organization that promotes the perpetuation and appreciation of native flora and fauna of Illinois and the habitats that support them.
- http://www.illinoisaudubon.org/