Renewable Energy

• Greenenergy360.org - online calculator to help assess renewable energy options in terms of energy yield, economics and CO2 reduction.
• REUK - Renewable Energy UK - up to date information about alternative energy generation
• CAT - Centre for Alternative Technology
• Green Pages - The Global Directory for Environmental Technology
• IESD - Institute of Energy and Sustainable Development
• NEF - National Energy Foundation, Milton Keynes, UK
• NREL - The US National Renewable Energy Laboratory
• Practically Green

 Solar Energy

• ISES - The International Solar Energy Society
• ISET - Institut fuer Solare Energieversorgungs Technik
• SEI - Solar Energy International
• SNL - Sandia National Laboratories, Photovoltaics
• UNSW - The Photovoltaics Special Research Centre
• ZSW - Centre for Solar Energy and Hydrogen Research
• USA Million Solar Roofs