Everythin' you need to live needs to be supplied by life support. Air, Water, temperature, sewage, recyclin' - you name it.

The ones we're probably most concerned about are air and water - those are the two main systems, and everythin' else feeds into those.

But the food, for example? Those machines that spit it out? They're basically 3d printers, from what I can tell. Which means they need a source for the basic buildin' blocks of the food. Protein. That ain't gonna be endless, either.