General Motors sold 608 Chevrolet Volt cars, while, Nissan, its fiercest electric car competitor, has only sold 298 LEAF electric cars in the U.S. last month. In all, GM has sold 1,210 Chevrolet Volts in 2011 or 1,536 units since launching late last year, including 608 deliveries in March. Nissan, meanwhile, has apparently only sold […]

