RANKFURT AM MAIN, GERMANY -SEPTEMBER 15: Carlos Ghosn, the President and CEO of Renault, (L) and Juergen Grossmann, CEO of German energy giant RWE , pose next to a charging device for electric cars  at the international motor show IAA on September 15, 2009 in Frankfurt am Main, Germany. The world's biggest auto show runs until September 27. Getty Images logo Getty Images 2 months ago

RANKFURT AM MAIN, GERMANY -SEPTEMBER 15: Carlos Ghosn, the President and CEO of Renault, (L) and Juergen Grossmann, CEO of German energy giant RWE , pose next to a charging device for electric cars at the international motor show IAA on September 15, 2009 in Frankfurt am Main, Germany. The world's biggest auto show runs until September 27.