Grrrr. It's efficiency is based on using a fuel cell. There seems to be a few ways around of storing Hydrogen in clever ways - this just adds to the list. Bu

Grrrr. It's efficiency is based on using a fuel cell. There seems to be a few ways around of storing Hydrogen in clever ways - this just adds to the list. But until we discover unobtainium that's as efficient as platinum in fuel cells but common and a fraction of the price, it's all a pipe dream. Had they burnt it in an ICE, and come up with those figures then OK. As it is, when using technology that exists now it won't be 5 kg per 500km, it will 25 kg at best, and 500l of this material will be required.