You're on a plane. The oxygen masks have dropped. While you're screaming and crying, does it occur to you to wonder where that oxygen comes from? It's not a scuba tank. Here's how weed killer, fireworks, and candy destroyers keep you alive.
Source Gizmodo http://feeds.gawker.com/~r/gizmodo/full/~3/RBSEBI2bDFg/planes-dont-carry-tanks-of-oxygen-so-whats-in-your-em-1697413912
