  Transcriber's Note: This etext was produced from Analog Science Fact & Fiction September 1963. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed. THE THIRST QUENCHERSEarth has more water surface than land surface—but that does not mean we have all the water we want to drink. And right now, America is already pressing the limits of fresh water supply.... |
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