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...[[gasoline]], [[diesel]] or [[methane]], in a modern [[internal combustion engine]], but they produce more pollution than would use of that energy in [[plug- ...the use of [[fuel cell]]s and [[electric motor]]s instead of a traditional engine. Hydrogen reacts with [[oxygen]] inside the fuel cells, which produces [[el

...The HV provide better fuel economy than a conventional vehicle because the engine is smaller and may be run at speeds providing more efficiency. ..., [[#Full hybrid|"full" hybrids]] such as the Prius can use the combustion engine to generate electricity by spinning a [[generator]] (often a second electri