I've also read that hydrogen is some kind of way for the petro-industry to maintain its infrastructure and business, since it's a pseudo-green energy which can

I've also read that hydrogen is some kind of way for the petro-industry to maintain its infrastructure and business, since it's a pseudo-green energy which can be advertised as an alternative to batteries. Steam reforming is not green. Electrolysis is great but it's less efficient, although it would work with nuclear energy since nuclear can give energy in abundance. There are 2 sides to reduce the carbon footprint: nuclear energy and energy sobriety.