this post was submitted on 30 Oct 2025
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It's probably going to be built to be as self-sustaining as possible. (Except Elon's, because he almost certainly insisted on having final say on the design.)
e: Anyway, you put the concrete on the door and the ventilation.
Humans do not currently have the technology to create long term, self-sustaining closed ecosystems.
No one on earth has successfully created one, and biodome was cut short due to private equity buying it out and basically forcing the project to shut down.
The billionaire bunkers may be designed for long term survival, but they will have a finite amount of food at least. Water can be replaced via wells, electricity can be generated with SMNRs(if the billionaires even own those), and food may be able to be supplemented for a while with grow lights, but eventually the soil will deplete due to not having a sustainable ecosystem.
All we have to do is poor concrete in front of the entrance and wait.
That's excluding killing their air supply which is traditionally how you force people to evacuate bunkers sans bunker busters or heavy bombardment.
While technically "finite", the term takes on a different meaning when you consider the scale of resources they control. It would take an infinitesimal fraction of $400B to buy enough dried goods to last a generation or two. I don't want to wait that long.
That's why you cement the air ventilation!