Automakers show ambitions in green car drive

Visitors take photos of a BMW concept car in the 14th Shanghai International Automobile Industry Exhibition in east China's Shanghai, April 21, 2011, the first day the exhibition open to public. About 2,000 carmakers and parts providers from 20 countries and regions showcased 1,100 car models, while 75 of which made their world premieres in the auto show. [Photo / Xinhua]