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- US Department of Energy http://www.energy.gov/
- U.S. Green Building Council
- Lean Manufacturing and Environment - EPA
- Profiting From Clean Energy "A Complete Guide to Trading Green in the Solar, Wind, Ethanol, Fuel Cell, Carbon Credit Industries, and more"
- Greenopia "We are with you in aiming to create a more sustainable, sensible and sane world"
- Energy Star
- Renewable Energy World "we have created perhaps the single most recognized and trusted source for Renewable Energy News and Information on the Internet"
- Green Collar Economy "This business-focused community is built around you - the first generation of green collar professionals"
- GreenBiz - Green World Media