Its extremely rare to see a Toyota Mark X Zio in the U.S since the minivan is exclusively sold in Japan only. Anywho, this is no ordinary petrol powered Mark X, it is in fact running on hydrogen fuel cell. Spied undergoing hot-weather testing in Death Valley, CA, unusually the mule is wearing Michigan plates and is left hand drive...?Following in the steps of BMW and Honda, will hydrogen be the answer to future fuels? Toyota is of course very well known for its world-leading hybrid technology, but as we all know hybrids are just a step forwards. Other automakers will be extremely interested in this vehicle if it gets shown publicly and still runs on hydrogen, because Toyota is a pioneer and leader of the hybrid cell system.