It's not hard to see how journalists -- anyone, really -- could conclude that Zuckerberg is building a doomsday bunker.
For long term habitation, you would solve it like any other engineering problem. How many people do you need to support, against what threats, for how long and what safety margins do you need.
Air is a solved problem, you either pull/push from the outside environment and filter on its way in (open circuit), or you treat the air (closed circuit). Waste goes into a leech field or is incinerated. Electrical is generated / stored onsite or powered externally.
Some people have security teams they pay millions of dollars per year for, who ensure they aren't kidnapped, injured or otherwise harassed.
> Some people have security teams they pay millions of dollars per year for
I mean you're not even wrong? This seems to reinforce everything TFA said about Zuckerberg's $250 million island compound with 5,000 square foot underground living quarters being a "survival bunker."