Aerobic composting is a process that uses oxygen to break down organic waste into compost.  Aerobic decomposition produces heat as a byproduct, which further accelerates the process and can help kill pathogens and weed seeds.  Aerobic composting typically results in less unpleasant odors .

Humus is the end result of the decomposition process, a stable, dark-colored organic material that remains after most of the plant and animal materials have decomposed.  Humus is good for plants and contains organic compounds which nourish the plant as it grows.

Compost is partially decomposed organic material that is created through a controlled composting process, and it can be further broken down by soil organisms when added to soil.