Not sure what 'Wifi 5G, crypto-currencies and particle beam research' have to do with critiques of renewable (sic) energy. Agreed that nuclear is just more resource exploitation, soon to run up to its own limits. I expect the book covers that at length.
'I’m still keen on seeing what can be done with ocean based bio-fuels' - what, like burning seaweed? Following Jensen's example of breaking identification and replacing the 'we' with 'capitalists' or 'industrialists' I have to say I'm not at all keen to see what they might be able to do. The oceans have already been emptied of enough of their life without moving to harvest and burn the remainder to power the insatiable industrial/capitalist economy. If you're talking about small community use that's another thing...