Word: fueled
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Dates: during 1990-1999
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What is often left out in the buzz is that fuel cells are hardly a new technology--though the techniques that are making them accessible to the masses...
...Fuel cells have been around since well before the Civil War, but until now, like many other "environmentally-friendly" energy sources, they have been too expensive to be worth using...
Unlike an internal combustion engine, which burns its fuel so inefficiently that only 20 percent of the energy in gasoline gets used, a fuel cell can pull off at least 30 percent efficiency by reacting its special fuels--hydrogen and oxygen gas--electrochemically...
...efficiency isn't the only reason fuel cell advocates take the gadgets so seriously. In theory, unlike internal combustion engine--which spew greenhouse gases such as carbon dioxide into the atmosphere--a fuel cell's only "pollution" is pure water and electrical current...
...despite their advantages, fuel cells still have yet to find their way under the hood of passenger cars. Industry experts attribute the delay to scarcity of fuel, price and size...