How will man fill his future need for energy when the world begins to run out of readily accessible supplies of gas and oil? One answer now being investigated is hydrogen. It is an extremely efficient fuel that burns with almost no pollution, and the supply is virtually limitless in the water that covers two-thirds of the earth's surface.
The economics of energy production now limits hydrogen to a small role. To extract hydrogen from water or petroleum products with conventional electrolytic processes makes it cost about three times as much per unit of...
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