The author initially describes the basic physical principles associated with energy and the rise of energy usage in the United States. Also discussed are the ways energy limits growth and its use in various sectors of society. It is suggested that the decentralization of America's electrical system will save a great deal of energy. A variety of energy resources for the future are examined; fossil fuels, nuclear fission and fusion, geothermal, tidal and hydroelectric power and hydrogen. The main topic is various forms of solar energy. Research concerning large-scale solar power projects is suggested to determine the amount of energy required to build and operate them. Another focus is a variety of decentralized uses of solar energy. Finally, energy from the wind is discussed in light of storage, equipment, present use and future possibilities. (TM)