eh we starting to creep into sci fi territory like mbs. i hope lawrence not thinking of these when he also talk about "frontier" technologies. thats 25% of our budget that he put into his slush fund, was it?

https://archive.ph/kasaz#selection-1413.288-1417.267
The latest five-year plan ordains the commercialisation of fledgling fields like delivery by drone, artificially intelligent robots, hydrogen power and even brain-computer interfaces—all over the next five years.
In addition, within another five years the party wants to see breakthroughs in a number of “frontier technologies”. The list includes fusion power and quantum computing, which promise to revolutionise energy and information technology, but have proved hard to crack.

i mean. first thing , off hand. hydrogren power has a storage and transmission problem. physics problem. unsolved. some lab might have a magic sponge that can do it in experiments. thats about it.

im all for storing excess wind/solar chemically in the form of methanol (ch3oh). maybe even ammonia(nh3) if u must. or even methane(ch4) knn.
but h2 itself. u put in any container or pass it thru any pipe, it will leak. u cannot compress it enough to get energy density to match petrol. and if u compress it u need an expensive container. if u liquify it..boiling point -252c...your bottle lagi expensive. the only solutions are magic sponges and they are still magic as of now. in industry they use low temperature + high pressure. yes it leaks.

we already have large existing industry that deal with methane. i.e. lng or cng. it leaks a bit too. but the logistics is generally done.
the ammonia industry is also large. tho not as large as the methane one. the awkward is its still a gas a room temperature. tho it requires less effort than methane to liquify.
and then finally theres methanol. many places already sell petrol spiked with ethanol. its about the same. its behaviour is not too different from petrol. which we have a large industry handling it already. that its a liquid at room temperature like petrol is nice. molecules are close together and u get more joules out of it per kg or cm3 when u carry it around. :p

i dont understand the pure h2 economy.

ok the problem with methane is its leaking to the atmosphere as a greenhouse gas.
traditionally when it burns in internal combustion engines. combustion is always incomplete and some will be released in the exhaust.
new engines , which exist by now, need to handle it differently.
different kind of leak.