It may sound a little crude or unreal, but the city of Flagstaff could be the first U.S. city to power its cars from a fuel derived from what residents flush down their toilets.
City officials are evaluating whether to spend nearly $500,000 next year to test a machine that is supposed to turn sewage sludge into heat, liquid fertilizer and a hydrogen-based fuel to power government vehicles.
The device, which is not in operation anywhere else in the United States, would essentially burn some of the biosolids left over from the sewage treatment process at Flagstaff's Rio de Flag plant by putting the waste through a 10,000-degree electric arc.
http://www.azdailysun.com/articles/2007/07/01/news/20070701_front%20page_19.txt
I'm going to do some research to see how viable the plan is, as the company hasn't actually done it before.
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