Biodegradable is a term we use for a product breaking down into natural elements, carbon dioxide, and water vapor by organisms like bacteria and fungi. Technically, just about everything is biodegradable, although it will take hundreds of thousands of years for most things to biodegrade.a term that we use for how a product breaks down. But when we use the term in a modern sense we are referring to natural products that breakdown quickly such as fruit, timber, animal. It’s a term that we are seeing used more and more frequently as the world wakes up to human impact.