Question

Why are some substances biodegradable and some non-biodegradable?

Answer 1

1. Substances are classified as biodegradable and non-biodegradable because some substances can be decomposed by microorganisms, and some cannot.
2. Substances that are broken down into simple soluble forms are called biodegradable substances. For example, Cotton, wood, paper, wool, etc.
3. Substances that are not decomposed by microorganisms into harmless substances are called non-biodegradable substances. Examples include plastic, polythene, DDT, etc.