Overall performance, cost, market potential, and environmental impact are assessed for fuels and electricity derived from hydroelectric, wind, photovoltaics, solar-thermal, geothermal, ocean and biomass energy sources. In addition, practical and specific recommendations for promoting the adoption of renewables on a broad scale are presented and analyzed. Includes photographs, tables, figures, and index. Copyright (C) Muze Inc. 2005. For personal use only. All rights reserved.