Fuel cell vehicles go mainstream

While research continues on making fuel cells a more practical choice for vehicle propulsion - by using hydrogen gas to make electricity, with nothing but water vapor as the only exhaust emission - several models are making the transition from prototype to reality. Fleet Owner got to view a few such vehicles at the 2017 Washington Auto Show, notably Toyota's Mirai sedan and Honda's Clarity fuel cell car. (All photos by Sean Kilcarr for Fleet Owner)