| 11. | The outcome has been an internal combustion engine that's incredibly competitive ."
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| 12. | The internal combustion engine is a prime culprit behind global climate change.
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| 13. | Hydrogen could eventually replace conventional fossil fuels in traditional internal combustion engines.
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| 14. | The magnetic direct energy converter is analogous to the internal combustion engine.
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| 15. | Various scientists and engineers contributed to the development of internal combustion engines.
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| 16. | Later, internal combustion engines powered machines until rural power supplies became available.
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| 17. | Internal combustion engines used with lawn mowers normally have only one cylinder.
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| 18. | It is much more complex when used with internal combustion engines.
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| 19. | "That is his policy for the environment, to eliminate the internal combustion engine,"
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| 20. | Fuel cells were invented 156 years ago _ before the internal combustion engine.
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