The new Chevrolet Volt extended range electric vehicle won't go on sale before November - and only in seven States at launch, yet General Motors has already revealed plans to lift annual U.S. production capacity by 50 percent, from 30,000 units to 45,000 units, in 2012. The announcement on the production increase came as U.S. President Barack Obama toured the Detroit-Hamtramck facility, where the Volt is being built.
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