Fuel Cell Motorbike to Hit U.S. Streets

Fuel Cell Motorbike to Hit U.S. Streets
Dubbed the ENV (or "envy"), the hydrogen-powered motorcycle emits only water vapor and runs as quietly as a PC. Total fill-up cost: four dollars (U.S.). ... At the heart of the hydrogen-fueled motorbike is a compact, proton exchange membrane (PEM) fuel cell ...

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