The National Space Society is the preeminent citizen’s voice on space exploration, development, and settlement. The NSS Vision is “People living and working in thriving communities beyond the Earth, and the use of the vast resources of space for the dramatic betterment of humanity.”
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Lunar Resources Utilization for Space Construction. Study conducted for NASA by General Dynamics Convair Division in 1979 concluded that lunar resources could supply 90% of the material for power satellite production and become cost effective if more than 30 satellites are produced. A nice summary of this study appears in Toward Distant Suns, Chapter 8.