Hydrogen is much more difficult to store. It escapes easily from any container you put it in and causes hydrogen embrittlement for any metal you try to use to

Hydrogen is much more difficult to store. It escapes easily from any container you put it in and causes hydrogen embrittlement for any metal you try to use to contain it. Apparently it can be stored in abandoned salt mines and we probably will use them for that eventually but you dont always have one of those handy.