John Prusa hasn't paid an electric bill in almost nine years. And with a tank of cooking oil in the bed of his diesel truck, he says he can drive from his home in Barbour County, West Virginia to Florida and back.
Some people are worried that lots of plug-in electric cars will cause brownouts or blackouts. At least two automakers will have plug-in electrics on the market next year. But utility companies say, don't worry. They're ready.
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