Where does air come from
Yeah, uhh, arabbit is right, trees
That´s the mystery I´m never gonna find out.
originally gasses formed when the earth was bombarded by asteroids and comets while it was being formed
The atmosphere formed the same time the planet did. It's mostly made up of nitrogen (78%) and oxygen (21%). All the other gases are present in much smaller proportions.
Trees = )
Plants or anything that does photosynthesis.