Define biodegradable substances.

Biodegradable substances are materials that can be decomposed into simpler, non-toxic substances by the action of microorganisms such as bacteria and fungi under natural conditions.

These substances break down through biological processes into basic components like water, carbon dioxide, and organic nutrients. The decomposition occurs relatively quickly and does not harm the environment.

Biodegradable substances are typically derived from natural sources, such as plant and animal matter. Examples include food waste, paper, cotton, and biodegradable plastics.

Because they decompose naturally, biodegradable substances are considered environmentally friendly and play an important role in reducing waste accumulation and pollution.