Herbert Diess, development chief of Bayerische Motoren Werke AG (BMW), speaks during a joint news conference with Toyota Motor Corp. in Nagoya, Aichi Prefecture, Japan, on Thursday, Jan. 24, 2013. Toyota, the world's biggest maker of gasoline-electric hybrid vehicles, signed a binding agreement with BMW to jointly develop fuel-cell systems for cars. Photographer: Kiyoshi Ota/Bloomberg via Getty Images