Selling the Air We Breathe - ABC News
60$ a bottle? Seriously? Are people stupid enough to pay for something that's free?
Answer: Yes. We did for bottled water. I could understand selling bottled water at restaurants and corner stores, because you're paying for the convenience of having a small, portable bottle of water which you immediately dispose of after you're done. But then people go off and buy it in bulk from grocery stores. My family often did this during the winter, because our tap water isn't safe to drink.
Anyway, just like the video says, the air we breath is only 20% oxygen and breathing pure oxygen can kill you.