New York Times: When automakers rolled out their new electric cars three years ago, they had big plans. Even President Obama, in his State of the Union address in 2011, predicted there would be as many as a million of them on the nation’s roads by the middle of the decade. Results have, so far, fallen way short of expectations. Only about 36,000 battery-powered vehicles were sold this year through July, according to the auto research site Edmunds.com. And many of those sales were spurred by heavy discounts from…

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