CC
You're quite welcome.
I see in looking more closely at what I wrote that I did not cover "storage". All points along the production/use chain are again "known technology" (basically tanks and pipelines), except for "on-vehicle" storage. There are, at this point, many possibilities, but none which will yield the current cruise range of gasoline/diesel vehicles. The safest is probably metal-hydride, and the current most practical is probably ultra-high pressure tanks. It may be that folks will just have to "fill-up" more often.