• Renewable resources, especially terrestrial solar and wind, are growing rapidly, but are starting from such a small base that they will be of little help in the next few decades • Full accounting for the external and environmental impacts of energy acquisition and use will hasten the penetration of renewables • Energy costs from all sources will be substantially higher in the future • Solar power imported from space will become competitive first in niche markets where the cost of energy is high • Broad implementation to serve primarily the Developing Countries will be realized when the cost of transport to orbit becomes significantly less that at present. It is this author's belief that the world needs new energy options and a level playing field for making energy source decisions. A positive step that professionals in aerospace, energy, environment, finance, and other areas can take is to promote the implementation of environmentally-friendly sources and the adoption of realistic measures to reflect all aspects of our acquisition and use of energy. References [1] World Energy Council, Energy for Tomorrow's World, 15th WEC Congress, Madrid. Spain, September, 1992. [2] British Petroleum, Corporate Communications Services, "BP Statistical Review of World Energy", annually in June. [3] Pachauri, R.K., Energy and Development, Keynote Address, Division 3, 15th WEC Congress, Madrid, Spain, September, 1992. [4] International Atomic Energy Agency, International Institute for Applied Systems Analysis, Organization of the Petroleum Exporting Countries, and United Nations Industrial Development Organization, "Energy in the 21st Century, New Challenges and Goals", 15th WEC Congress, Madrid, Spain, September, 1992. [5] Duncan, Richard C., "World Oil, Gas, and Coal Life-Cycles: Do Hubbert's 1956 Predictions Agree with 1993 Data?", Presented at the 16th Annual North American Conference, United States and International Associations for Energy Economics, November 6-9, 1994, Dallas, Texas. [6] Erb, R. Bryan, "Power From Space - When?", 43rd Congress of the International Astronautical Federation, Washington, DC, August 28 - September 5, 1992, Paper IAF-92-0595. [7] Johansson, Thomas B., Henry Kelly, Amulya K.N. Reddy, and Robert H. Williams, Eds, Renewable Energy: Sources for Fuels and Electricity, Island Press, Washington, DC, 1993.
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