Environment: The Waterless John

Every time a toilet is flushed, about five gallons of water sweep a pint of human waste into the sewage system. This prodigious waste of good water has long upset dedicated environmentalists. Indeed, after the invention of a pollution-free car, a better toilet system has been their No. 1 priority.

A new process quaintly called Aqua Sans may be the answer. It was created by the Chrysler Corp. in response to a request by the U.S. Navy for an improved way to handle wastes aboard ships. "We didn't want anything to go overboard," says...

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