Renewable energy is derived from sources that are continuously replenished by nature and are therefore inexhaustible in human timescales. These sources include solar, wind, wave, hydro, biomass, tidal and geothermal. Interestingly, all 'deep green' renewable sources except tidal and deep geothermal are, in fact, derivatives of solar energy: the sun is the earth's primary energy source, ultimately driving almost every meteorological and biological process. There are also several 'pale green' anthropogenic renewable sources, such as landfill gas and other more advanced energy-from-waste technologies.
The eLearning scenario has been develeoped by SWEA (content, Alastaire Stevens, Kaye Welfare, Jessica Owen, www.swea.co.uk/), UfU (moodle, Gerti Scharp, www.ufu.de) and IZT (layout, Michael Scharp, www.izt.de). The project was co-funded by the GTZ Gesellschaft für technische Zusammenarbeit. The materials have been developed with the s2w-compiler and the EF-editor (Source: Prof. Dr. Hermann Körndle, University of Dresden, Psychology of Learning and Instruction).