and output very low cost power. Energy intensive industries such as refining of primary materials, recycling wastes, or production of synthetic fuels could take place in small regions remote from human populations, even in biological deserts. LPS can provide net energy to Earth (Criswell 1991) and do so at lower costs than any alternative. Each lunar power base consists of thousands of power plots. Each power plot consists of a field of solar collectors, primarily thin-film photovoltaic cells, microwave transmitters, and the billboard-sized microwave screen reflectors. Each base projects thousands of separate power beams. Depending on the power needs at Earth the beams are turned down or cut off to one rectenna and reformed to feed power to another. The bases are described in the technical literature (Criswell and
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