The H2 cycle is quite wasteful. The touted "climate friendly" H2 will supposedly come from electrolysis. But electrolysis is a very inefficient process (as much

The H2 cycle is quite wasteful. The touted "climate friendly" H2 will supposedly come from electrolysis. But electrolysis is a very inefficient process (as much as 65% of the energy is lost in the process), that's why industrial H2 is mostly produced from natural gas. Then to transport H2 efficiently you need to compress it to several hundred bars. That process, again, consumes a lot of energy. Then you'll have to transport and distribute that H2 around the country, to fill your car's tank. All in all, the energy efficiency of the whole cycle is at most 15%, more or less the same as diesel. H2 is a made-up response to the terrible ROI of wind turbines and solar when not backed-up with storage. That's how it's supposed to be the future. However when you do the math you quickly realize that it would be much more cost-effective to use nuclear power for combined thermolysis/electrolysis, that would get a way higher yield and ROI...