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High-Efficiency Thermal Engines

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Internal-combustion engines, the dominant form of automotive power today, will almost inevitably play an important role in the global transportation sector in the decades ahead. Today’s gasoline-powered engines typically have efficiencies in the range of about 25%, even though in theory they’re capable of more than doubling that. Significantly more efficient engines could allow the transportation sector to use as little as half as much fuel, which in turn would cut emissions per mile in half. The development of breakthrough high-efficiency thermal engines therefore presents a huge opportunity for dramatic reduction in global greenhouse gas emissions from the transportation sector.