HarmonicFarts O2 is the form of oxygen which does not burn, along with O3. They are vitually the same thing, and both do not burn by themselves. Learn some basic chemistry.
O3 is Ozone, used to destroy bacteria. It will destroy itself as soon as it can, because it is almost always O2. And who cares about the powder toy's realism? If it was the same as life, then it would be to hard to keep up with.
Just throwing it out there but, if there is a flame near oxygen, you can't necessarily say that the oxygen isn't increasing the size of the flame instead of burning(after all it's easier to program anyway -.-). Don't be a specifics-fag(a.k.a. asshole).
We don't care about exact chemistry for one. We just want it enough to use, not just for real life based program... Re-coding the O2 code would changes many simulations.
I don't get why you do not care about realistic factors, it would make this game/simulation much better. It's great already, the best physics game iv'e played that isn't professional, but if you were to get sponsors or something you could definitely improve Powder Toy's boundaries. But I know that would cause problems with the people (such as computer slow down). But I am just saying, it would be nice if you could integrate more realism (although this game has GREAT physics already great job to all who work on TPT)