Composting is the biological break down of organic kitchen waste, such as vegetable and fruit peelings, and yard waste, such as grass and leaves, into a soil-enriching compost. Thousands of organisms: worms, insects, fungi, bacteria, naturally break down organic wastes into simple compounds that plants use. The well managed backyard composter mimics and speeds up nature’s decaying process. Be patient, materials do decompose at different rates, but all will break down eventually. See 10 Reasons to Love Compost.