This four-color poster shows the many sources of renewable energy, including biomass, passive and active solar energy, photovoltaics, power towers, hydropower, wind, geothermal, OTEC, waves and tidal energy. Its black and white reverse supplies background information and suggestions for student learning activities. This is one of NEF's "Sources of Energy" posters. K-8, 23" x 35", Four Color, B/W back.