An item is biodegradable if it is broken down rapidly in a natural environment by the actions of microorganisms or sunlight.

Able to be broken into simpler chemical compounds by microorganisms. Organic materials are biodegradable.

A material that can be broken down to simpler components by a biological process.

Capable of being broken down by microorganisms. Breakdown products can often be re-used by other organisms as food and energy sources.