Within 50 years, the U.S.'s demand for fresh water will greatly exceed its supply. Rather than wait for the great thirst, some politicians want to pipe water south from Canada's full rivers, much to the Canadians' displeasure. Others propose desalting ocean water, though the cost (about 20ยข per 1,000 gallons) is still high. Relatively speaking, by far the best bet is to recycle sewage water.
"The idea is repulsive to people who do not understand it," says one advocate of reclaimed water, Dr. Roger E. Kasperson of Clark University in Worcester, Mass. Even more repulsive is the fact that the drinking water...
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