You're all doomed so hold your breath and just get it over with

Well oxygen is actually slowly killing you because of it's reactivness. It would likely be poisonous to aliens if they ever came to earth.

We're doooooooomed!

well i guess it would make me sad, but then i'd distract myself by thinking of something happier and the fact that there's nothing i can do about it really. ) :

Sounds like a good reason to tax it.