The photo taken on April 19, 2011, shows a BYD E6 at the 14th Shanghai International Automobile Industry Exhibition (Auto Shanghai 2011). The electric model has been used as taxis in Shenzhen, South China's Guangdong province.  [Photo/Crienglish.com]

Toyota's electric cars displayed at the 14th Shanghai International Automobile Industry Exhibition (Auto Shanghai 2011). [Photo/Asianewsphoto]