National
- AASHE - The Association for the Advancement of Sustainability in Higher Education
- AASHE Climate Solutions
- AASHE Resource Hub
- Adventure Scientists
- Alliance to Save Energy
- America Recycles Day
- American Forests
- American Rivers
- American Society of Mammologists
- American Solar Energy Society
- Arbor Day Foundation
- Arthur Carhart National Wilderness Training Center
- Association of American State Geologists
- Association for Environmental Studies and Sciences
- Association for State Wetland Managers
- Call 2 Recycle Battery Recycling
- Campus Race to Zero Waste
- Carton Council
- Clean Energy States Alliance
- Center for Outdoor Ethics Leave No Trace
- College and University Recycling Coalition
- Compete to Reduce - Campus Conservation Nationals
- Database of State Incentives for Renewables and Efficiency
- Donate Stuff
- Earth 911
- Earth Force
- Ecochallenge
- Ecological Society of America
- Energy Sage
- Energy Star
- Energy Star Battle of the Buildings
- Environmental Defense Fund
- Environmental Protection Agency
- Environmental Protection Agency Food Recovery Competition
- Environmental Protection Agency Greenhouse Gas Equivalencies Calculator
- EPA Recycle City Game
- Environmental Working Group
- Environmental Working Group Skin Deep Database
- Fair Trade USA
- Forest Stewardship Council
- Further With Food
- Game Day Challenge
- Green Apple Day of Service
- Higher Education Associations Sustainability Consortium
- How to opt out of receiving junk mail, catalogs, coupons, phone books by Global Stewards
- ICLEI Local Governments for Sustainability
- Land Trust Alliance
- League of American Bicyclists
- Let's Go Solar
- Let's Go Solar: How Solar Panels Work
- Marine Stewardship Council
- Menus of Change
- Midwest Evolve
- Moms Clean Air Force
- National Aeronautics and Space Administration
- National Council for Science and the Environment
- National Environmental Education Foundation
- National Marine Educators Association
- National Oceanic and Atmospheric Administration
- National Science Digital Library
- NOAA Great Lakes Environmental Research Laboratory
- National Resources Defense Council
- National Science Foundation
- National Wildlife Federation
- National Wildlife Federation Campus Ecology
- Net Impact
- North American Association of Environmental Education
- North American Students of Cooperation
- Ocean Conservancy
- The Oceanography Society
- The Offset Network
- Organization of Biological Field Stations
- Pedestrian and Bicycle Information Center
- Pew Research Center: Energy & Environment Topics
- Plastic Film Recycling
- Post-Landfill Action Network
- Power Shift Network
- Rainforest Alliance
- Second Nature
- Sierra Student Club
- Slow Food USA
- Society for Conservation Biology
- Society for Ecological Restoration
- Society for Wilderness Stewardship
- Story of Stuff
- Sustainability Education and Economic Development Center
- The 5 Gyres Institute
- The Nature Conservancy
- The Trust for Public Land
- The Wildlife Society
- U.S. Business Council for Sustainable Development
- U.S. Composting Council
- U.S. Department of Energy
- U.S. Energy Information Administration
- U.S. Department of Energy Clean Cities Coalition
- U.S. Department of Energy Office of Energy Efficiency and Renewable Energy
- U.S. Green Building Council
- U.S. Green Building Council TRUE Zero Waste Certification
- U.S. Fish and Wildlife Service
- U.S. Forest Service
- U.S. Partnership for Sustainable Development
- U.S. Zero Waste Business Council
- Waste Reduction Model
- Wildlife Conservation Network
- World Wildlife Fund