Definition: Biodegradable means capable of being decomposed back into the soil by biological agents, especially bacteria. "Biodegradable" is often used to refer to items that are to be disposed of. Environmentally sound landscaping and gardening often takes into account whether materials are biodegradable. For instance, plastic might be rejected as a mulch material because it is not biodegradable.
Examples:As strict practitioners of organic landscaping, town officials refused to consider rubber mulch for playgrounds.