RE:RE:Solar to hydrogenactually, commercial rockets do use petroleum as rocket fuel because economic while cost is no object for NASA that uses liquid hydrogen. I can't see how regulators would approve H2 fuel at 700 bar pressure for retail use. The potential risk of leak and accident of ultra high pressure tank and the tank cost would easily rule out mass adoption. There are several hydrogen options out there but it seem the pro green narrative focus only on pure hydrogen and disregarded other hydrogen derivatives.
RP1/LOX is kerosene/liquid oxygen. The most popular and cheapest fuel with a superbly developed infrastructure. It has an average environmental friendliness and density. This fuel pair is used in many modern rockets, particularly in the SpaceX Falcon 9, Soyuz, in the first stage of Atlas 5.