• Bureau of Energy, Ministry of Economic Affairs, Taiwan
• National Renewable Energy Laboratory
• U.S. DOE Energy Efficiency and Renewable Energy
• Australian Greenhouse Office
• ITEBE
• UN/EC Timber Committee
• IEA - Hydropower 
• ISES
• The World Radiation Data Centre    
• Atmospheric Radiation Measurement (ARM) Program 
• Sandia National Laboratories' Photovoltaics page 
• American Wind Energy Association  
• Geothermal Resources Council