Unlike natural gas (which we can mine from the earth), hydrogen can't be an energy source because there's no place you can mine it. It can only be a medium of

Unlike natural gas (which we can mine from the earth), hydrogen can't be an energy source because there's no place you can mine it. It can only be a medium of transmitting energy: you need some other source of energy in order to create hydrogen, and then you can transport it somewhere else and use it there. So the question is what is that source of energy, and whether we could simply connect the source directly to where the energy is needed and cut out the middleman H2.