There is perhaps nothing more emblematic of the American century than the automobile. Assembly lines rolled out millions of Fords, Chryslers, Chevys and Buicks and made Motor City-Detroit, Michigan-the capital of the global car industry. But in the race to dominate the auto industry of the 21st century, it is China vying for the pole position. It’s Chinese auto-makers building the smart cars of tomorrow. And the energy fueling them is electric.