Volkswagen XL1 hybrid car, the world's first 1-liter
vehicle, made its debut in Beijing, capital of China, Oct. 23, 2013. The
vehicle, dubbed "the world's most efficient car," consumes only 0.9
liter of fuel when traveling 100 kilometers. It's said that only 250 units will
be produced for sale across the world. (Xinhua/Photo)