Biodegradable items are capable of being broken down into more basic components by the action of living things and processes. Biodegradable items are usually broken down by bacteria, fungi, and other simple organisms (microorganisms). Think: biodegradable bags.

When considering biodegradable items, the amount of time it takes for the item to break down and what basic elements it breaks down into are very important. The easier to break down, and the more harmless the resulting basic components, the more effective the item is as a biodegradable product.

To learn more, go to:
http://www.merriam-webster.com/dictionary/BIODEGRADABLE
http://www.ecomall.com/greenshopping/organicsol.htm