Hydrogen impregnation is problematic to the safe long term storage an handing ol current materials technology that I am aware of. My lack of access to developing labs in this research; introspective current difficulties in corporate culture leadership to commit to an infrastructure facilitating big polluters such as commercial aviation. This discussion would be greatly appreciated. I am a big fan of nuclear power plants abilities to mass produce , given new ( known old school ) systems of safe reactor design. Obviously the the fossil industry will be the big investors...