On one side of the membrane, hydrogen is decomposed into its constituent electrons and protons.

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The highly reactive oxygen combines with hydrogen and carbon monoxide on the fuel side to make water and CO 2.

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Gunnar Lindstrom, who is charged with marketing Honda's alternative fuel vehicles in the U.S., believes that by 2020 six fuels will split the market: gasoline, diesel, biofuels, hydrogen, natural gas and electricity, perhaps working side by side in a single vehicle.

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The now positively charged hydrogen atoms migrate through the membrane to combine with oxygen on the air side to create water.

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