Engineuity, a company started by Amnon Yogev, has reportedly developed a method for vehicles to "produce their own fuel" using metals such as magnesium and aluminum to create hydrogen and steam.

ENGADGET: Engineuity developing hydrogen-creating, emission free vehicle

"Economics dictates that 95% of current U.S. hydrogen is produced by steam-methane re-forming of non-renewable natural gas, " Michael K. Heiman, professor of environmental studies at Dickinson College, wrote in a study of the proposed hydrogen economy last year.

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Hydrogen is conventionally produced by steam reforming natural gas, a process that wastes some of the energy stored in the gas while releasing large amounts of CO2.

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The former uses coal, oxygen and steam to produce burnable hydrogen.

ECONOMIST: Carbon capture and storage

Hydrogen can be made cheaply from natural gas through a process called "steam reformation, " which separates the carbon from the hydrogen.

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But this portion could grow, given the hassles of making hydrogen:It requires a six-story furnace, called a steam-methane reformer, where natural gas combines with steam and nickel at 1, 600 degrees Fahrenheit to unleash hydrogen gas.

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There's nothing new about turning coal into gas--19th-century street lamps burned "town gas, " a dangerous mixture of carbon monoxide and hydrogen, produced by blasting coal with steam.

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Revolutionizing Prosthetics 2009 program, relies on a modified miniature version of the same rocket motors the space shuttle uses to reposition itself in space: hydrogen peroxide is burned in the presence of a catalyst to produce pure steam, which is then used to move the arm.

ENGADGET: Rocket-powered mechanical arm might boost prosthetic tech