Alternative Fuel Vehicles

• California Energy Commission Transportation Choices

Biomass

• Biomass Energy Research Association
• DOE Energy Efficiency and Renewable Energy Network 
• EPA Biomass

Green Power

• EPA Green Power

Heliography

• Communicating with mirrors by James Riddle

Hydrogen Power

• Hydrogen Fuel Cell Energy Information

Hydropower

• DOE - Hydropower
• Federal Energy Regulatory Commission Office of Hydropower
• US Bureau of Reclamation Hydropower Program
• EPA Hydropower