• The availability and use of energy in its varied forms must be compatible with the Earth's ecology in the 21st Centuiy. Space technology coupled with wireless power transmission can be the key to meeting future energy demands using accessible renewable energy on Earth and ultimately the inexhaustible energy and material resources of the solar system. Acknowledgments The guidance and cooperation of Dr. Jean Pierre Contzen. Director General. Commission of the European Communities; Dr. Joachim Gretz, Program Manager, Joint Research Centre of the Commission of the European Communities; and the valuable contributions of Mr. Bradford Schupp, Program Manager; Mr. Thomas A. Weil, Consulting Scientist, Equipment Division, Raytheon Company; and Mr. Gordon Woodcock, Advanced Civil Space Systems, the Boeing Missiles and Space Group are gratefully acknowledged. References 1. Brown, W.C., 1965 Experimental Airborne Microwave-Supported Platform. Technical Report, Rome Air Development Center, Rome, N.Y., TADC-TR-188. 2. U.S. Department of Energy, Satellite Power System (SPS) Concept Development and Evaluation Program Plan, July 1977 - August 1980, DOE/ET-0034, U.S. Government Printing Office. No. 061-000-00031-3, Washington, D.C., 1978. 3. Ehricke, K.A., "Space and Energy Sources," Space Division, Rockwell Corporation, May 1972.
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