But I think it would need to be powered for temperature regulation, ventilation, and probably some humidity control and whatever else you'd need, like robot mushroom farmers.
I think lunar regolith is less toxic than Martian regolith, but it's still not something you or a mushroom would want to ingest. Razor sharp, statically charged poison.
I guess whatever is left over after Mr. Ignatiev has finished extracting resources might be non-toxic, and could be fashioned into a soil base for fertiliser.
And I guess there's nothing stopping us genetically engineering vacuum dwelling moon mushrooms in the long run.
(, Fri 4 Dec 2020, 18:47, Reply)