Composting

If it’s buried it could break down anaerobically, which is how methane gets produced. Compost specifically means aerated somehow. Minimally: being above ground. Ideally: actively turned.

About the animals comment… not owning pets doesn’t mean animals won’t mess with it. Virtually everywhere in the world that people are, rats also are. And they will come for food scraps. They are wily and wary and a lot of people are never aware of them. But keep it in mind as well. They can carry disease and they are pests generally which you don’t want to attract and feed.