In landfills, trash is often eaten by microbes.
Garbage is a substanse that gives out methane gas in landfillls. With the garbage all making methane, all different kinds of methane. It will explode so the tubes going out of them will go to our world. Did you know that over 1/3 of our trash is recycalable. Recycle or our world will explode from methane.
It is usually rotten food that makes us think garbage smells bad.