Solar energy is amply adequate for all the conceivable energy needs of the world. Surely solar energy will be important within 20 years, and if enough financial support should become available, the time could be considerably less. It is also a gripping drama which relates the gambles, ups and downs, and personal comments of the major inventors. Dr. Berger has done a monumental public service. The reason that Earth does not accumulate energy daily is because all the incoming energy is eventually degraded to heat and re-radiated to space.
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