Toshiyuki Shiga, chief operating officer of Nissan Motor Co., demonstrates charging the company's prototype electric vehicle at the Oppama test course in Yokosuka, south of Tokyo, Japan, on Monday, July 27, 2009. Nissan Motor Co., aiming to be the top seller of electric vehicles in the U.S., is readying electric vehicles in response to higher oil prices, demand for more fuel-efficiency and concerns over climate change tied to carbon exhaust. Photographer: Kimimasa Mayama/Bloomberg