Originally Posted by riceplant
And yeah, why do they use rebreathers? They held their breath for the dioxis stuff.
You know, holding your breath or using some invention to allow rather normal breathing aren't the same things. If you hold your breath, your body will start to suffer from the lack of oxygen, because no fresh oxygen is going to replace the carbon dioxide produced by the body. And that happens even faster if you do something, like dive to an underground city.
Of course any Jedi can hold his breath indefinitely. Too bad after a certain period of time he's doing it as a corpse - but indefinitely for sure.