The BIGGEST problem with clean energy

Storing Hydrogen?

Not easy to do.   Hydrogen being a very small molecule easily finds holes / pores in your storage tank.   Second of all Hydrogen when mixed with a tiny amount of air becomes readily explosive.   We have enough issues with explosive mixtures of natural gas.   

I would not consider it any way safe to have Hydrogen gas flowing into / around my home.    Or in a vehicle.

David