"Established in 1981, the Renewable Fuels Association (RFA) is the national trade association for the domestic ethanol industry."Renewable Resource Data Center
This U.S. Dept. of Energy-sponsored resource contains data relating to natural energy sources such as solar radiation, biomass, geothermal, and wind power. "
* Special Report on Renewable Energy Sources and Climate Change Mitigation Intergovernmental Panel on Climate Change.
This is a comprehensive summary of the technology and application of renewable energy with a specific focus on applications to avoid greenhouse gas emissions. The book starts with an excellent overview, "Summary for Policymakers"; the following "Technical Summary" compares the different technologies, their costs, and their technical potential. (Outstanding Title, Choice 2012)
What You Need to Know About Energy: Renewable Sources Produced by the National Academy of Sciences for the general public.
* Recommended by Choice, a publication of the American Library Assoc.