Photo: Hydrogen Gas Made From Renewable Organic Material

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New microbial electrolysis cell technology (bottom) can turn organic material into hydrogen, a new study says.

The method, which does not rely on nonrenewable energy sources, could someday make hydrogen-powered transportation—such as the hydrogen-fueled car (top, in 2006)—a reality.

Top photograph by Carlos Osorio/Associated Press, bottom photograph courtesy Shaoan Cheng

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