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By 2020 or so, depending on the progress of fuel cell technology, the last of the island's 9, 500 gasoline cars will be gone and only water-vapor-emitting fuel cell autos will remain, according to Taniguchi's plan.
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If you oxidize any hydrocarbon, you generally produce heat, carbon dioxide, and water vapor, assuming a relatively pure fuel source.
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If, on the other hand, you were to buy summer gasoline and try to store it until winter, you might find yourself having problems getting the fuel to ignite, due to the lower vapor pressure.
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One plus is that, apart from the possibly dirty business of generating it, the gas is the cleanest fuel on the planet, combining with oxygen to create H2O, pure water vapor.
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Also a type of electric vehicle, a fuel-cell car takes hydrogen gas and converts it into electricity, while emitting only water vapor.
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The gas is then fed into a stack of solid oxide fuel cells, where a chemical reaction between hydrogen and oxygen occurs, producing electricity, water vapor and a tiny amount of carbon dioxide.
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Clean, silent, (well, OK, a high-pitched whistling sound), uses no fuel whatsoever, except hydrogen, the most plentiful element on the planet, and emits only water vapor.
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