[tuatoru]

Not dumb at all. Well, not exactly air, but that's how it's done. Air doesn't contain enough water, so you need to add some.

Currently nearly all ammonia is produced by "steam reformation" of methane in air (which is mainly nitrogen). Very hot steam, air, and methane are mixed. The carbon in the methane is released as carbon dioxide.

The idea is to take the methane out of the process.