Energy has gone green and the future holds exciting potential for alternative power sources that are both earth-friendly and renewable. This set features a 34'' x 5 1/2'' (86.4 x 14 cm) banner and a 17'' x 22'' (43.2 x 55.9 cm) poster that summarizes alternative energy forms, including wind, wave, geothermal, solar, and biomass/biofuel power sources. Five additional posters provide expanded details about each form of alternative energy. Includes a two-page teacher guide. 8 pieces.