Only real life case of this I know of is described on this song.
Some dude said he wanted to be eaten in idon'tknow which media, and someone accepted.
This is the dude who ate a dude
I think they are making some weird spaceship with a self-sustain environment for people to leave there as nomads in the space.
Think of an enormous garden center on a spaceship, with water, earth and simulated solar energy, crazy.