Yeah the sun is fine, i guess anon.
good for crops
The problem is 1) how are you obtaining the radioactive elements required without exploiting miners, creating extractivist destruction and displacing those who live around mines
And 2) how do dispose of radioactive waste materials without long-term exposure of the environment to those poisons
Labor, extraction, surplus, it's always a bootstrapping issue and post-scarcity utopia is itself a cage to our imaginations and an obsession with logistics, production and the work machine.
Always great to see fantastic innovative eco designs only rich people can arrange in their expensive skyscraper penthouses!
Agreed, it's disheartening how much research and development in "sustainability" is done in the context of high technology and massive capital investment.
This article has some neat ideas about biomass fuels from another perspective: https://www.lowtechmagazine.com/2020/09/how-to-make-biomass-energy-sustainable-again.html
The only real technical piece is the combustion chamber, which lasts basically forever