Aaah, quite clever, thank you!

naturalist habitat is a dome, this is a residence. surface and underground. no sanity loss and food issues, the game sees it as an inside building, it attaches to the nearest dome for food and work.

Questions:
a.) aside from more people inside, what does this do differently from the naturalist one?
b.) can this be built underground or on Asteroids or only on the Mars Surface?
c.) colonists will still need food and lose sanity for working outside i guess?