Hankook's New Tire Uses Tree Resin to Keep Electric Cars Rolling

An electric car is a demanding thing. Sure, it doesn’t need gasoline or oil or nearly as much maintenance as a machine propelled by explosions, but dumping the internal combustion engine in favor of a battery and motors brings up a slew of fresh issues. Key among them, of course, is efficiency—the more miles you can squeeze from each kilowatt-hour, the better.

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