Originally Posted by oakbarn
CO2 is already oxygenated and cannot "go bad". It can be broken down into carbon and oxygen by plants. Al Gore told me so.
Is that this whole "global warming" thing he created?
haha i kid i kid
i'm glad you asked this question OP because I was wondering the same thing. My father just acquired a CO2 tank that has some gas left in it and is quite a few years old and he wasnt sure if he could use it or not.