Ohio University

A Zainesville zookeeper disputes police accounts of the Ohio town's infamous animal massacre

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For reasons explained before, we'll likely all be driving electric cars long before we ever see mass-market vehicles powered by hydrogen fuel cells, which was once the great clean-car hope. Still, the fuel-cell approach is obviously worth researching, and now researchers have lit upon a particularly promising fuel source. Oh yes, urine: Using hydrogen to power cars has become an increasingly attractive transportation fuel, as the only emission produced is water - but a major stumbling block is the lack of a cheap, renewable source of the fuel.

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