This report discusses many of the economic and policy questions related to the widespread introduction of solar power, presents recent progress in developing solar technologies and advancing their economic feasibility, and reviews some recommendations that have been made for achieving the early introduction and sustained application of solar technology, including suggestions for improving the federal solar energy program. Some of the topics included are: solar thermal energy, photovoltaic solar cells, biomass, wind energy conversion, small-scale hydropower, ocean thermal energy conversion, and energy storage. (BB)