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Energy development - wikipedia, free encyclopedia, Energy development field endeavor focused making sufficient primary energy sources secondary energy forms meet society.. http://en.wikipedia.org/wiki/Energy_development Education « landsat science, Landsat education offers wide range resources, including landsat images, animations, -14 classroom exercises, data tutorials, fact sheets, .. http://landsat.gsfc.nasa.gov/?page_id=11 Renewable energy - wikipedia, free encyclopedia, Renewable energy generally defined energy resources naturally replenished human timescale sunlight, wind, rain, tides. http://en.wikipedia.org/wiki/Renewable_energy