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Many places in the world (Think anywhere rural in a third world country) won't have the electricity infrastructure to handle electric cars in the near future. High efficiency petrol engines are still a very welcome invention for both the environment and for the many people who depend on petrol/diesel engines to keep the world spinning.

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Except for the fact that you actually don't need any sort of energy infrastructure whatsoever with electricity. All you need will be a solar panel in the near future, resulting in more homes with heat and lights, more people with access to inexpensive transportation, and a more equitable share of well being. Third world countries stand to benefit the most from electrification.

Using photovoltaics for electric heat is a lot more costly than solar-thermal water heating, so you'll likely see a mixture of those two.

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