Super-Efficient Cars Are Doable But Hit a Political Speed Bump – National Geographic

Posted: Thursday, March 16, 2017

He also suggested that some technologies, while considered improvements, haven’t yet delivered big fuel savings. Even though materials are getting lighter, with more use of aluminum and plastic composites, for example, cars generally are not. That’s because new cars have more “content,” Baron says: airbags, stereo speakers, seat heaters, and other safety or performance amenities that consumers now expect.

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