Among other things, San Francisco car conference features a VW prototype that runs on liquid hydrogen and pumps water vapor out of its tailpipe.
Volkwagen's HyMotion hydrogen fuel cell prototype. It can hit a top speed of 87 miles per hour and go for around 120 miles on a tank of liquid hydrogen. However, it may not hit the road for another 10 years. The car is on display at the 12th World Congress on Intelligent Transport Systems taking place in San Francisco this week.
Caption by: Bill Detwiler
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