Final answer:
Automobile engines have an efficiency of about 75% compared to theoretical maximum efficiency. Conventional vehicles are only about 20%-25% efficient in using energy from gasoline combustion. Hybrid cars are seen as more environmentally responsible.
Explanation:
Actual automobile engines have efficiencies that are about 75% of the maximum theoretical efficiency. In comparison, automobiles are only about 20%-25% efficient in using the energy released by the combustion of gasoline.
Hybrid cars are also mentioned as being more environmentally responsible compared to conventional vehicles.
Improving efficiency in vehicles can involve measures such as reducing weight, aerodynamic drag, and tire-rolling resistance.
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