User talk:Happiness.is.measured.in.leonards

Flame Alchemy
You're right, pure oxygen is not flammable, however, the article did not say it was. If you'll allow me to quote the article, you'll see it's grounded in scientific reality.
 * "...Roy...[manipulates] the concentration of oxygen in the air surrounding his target, raising its density to a level at which it becomes a volatile and flammable oxidizer, and creating narrow pathways of oxygen through which he can direct the ensuing flame that blossoms from the spark."

We do not say that he uses only oxygen, we say he uses various gasses in conjunction with oxygen to do flame alchemy.