website links: (the DOE/NREL website for the Solar Decathlon) (U.S. Department of Energy website) (National Center of Photovoltaic Research of U.S. Department of Energy) (Energy Efficiency and Renewable Energy Network of U.S. Department of Energy) (download an animation file on how a solar cell works) (U.S. Green Building Council) (useful information) (sustainable materials and equipment) (portal site on photovoltaics) (very useful links to construction industry sites of all kinds) (Design Corp - community based design) (site for Solar Design Associates, Steven Strong, president) (Homepage of American Solar Energy Society) (The Union of Concerned Scientists) (The Interstate Renewable Energy Council)