Judging by the slew of electric and hybrid vehicles being rolled out at the Frankfurt Auto Show, it might seem carmakers are tapping a large and eager market.
Toyota has two important vehicles coming in 2015: the next-generation Prius hybrid and the company's first hydrogen fuel cell car.
French carmaker PSA Peugeot Citroen unveiled Tuesday a petrol hybrid engine that stores energy using compressed air which it hopes will be a game-changing technology to improve energy efficiency.
General Motors is trying to take the Chevrolet Volt's electric technology upscale with a new Cadillac.
US President Barack Obama will later this week unveil new fuel efficiency standards for passenger cars and light trucks for the 2017-2025 period, the White House said Wednesday.
For years we've had great efficiency labels for washing machines, for refrigerators, for dishwashers and more.
Toyota Motor on Monday rolled out a cheaper, revamped Prius, seeking to boost its flagging sales and maintain its lead in fuel-sipping hybrids in the face of growing competition from rival Honda.