Lots of other information on crops grown for fibre, oil or chemical content with typical yields in the UK and Europe. Sheffield Heat and Power . Nicely illustrated description of the district heating system operated from municipal waste incineration in Sheffield. Geothermal Energy International Geothermal Association Based in Italy. Encourages research, development and utilization of geothermal resources worldwide.
Site has plenty of articles and pictures.
Located on the Oklahoma State University campus. Solar Thermal Energy and Photovoltaics BP Solarex . Leading centre for high efficiency silicon solar cell research and development. Links to other PV sites. Fraunhofer Institute for Solar Energy Systems.