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Electric cars have a road trip problem, even for the secretary of energy

04:04
Energy Secretary Jennifer Granholm is working hard to convince more Americans to embrace electric cars — and she knows this means the country's charging infrastructure needs to improve, fast. (Getty Images)
Energy Secretary Jennifer Granholm is working hard to convince more Americans to embrace electric cars — and she knows this means the country's charging infrastructure needs to improve, fast. (Getty Images)

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