Which of the following is not a biodegradable polluter?

Pollutants are broadly classified into two categories based on their degradation: biodegradable and non-biodegradable.

• Biodegradable pollutants are those that can be broken down into simpler, harmless substances by the action of microorganisms like bacteria and fungi. Examples include faecal matter, urine, and organic domestic waste (like kitchen scraps and paper).
• Non-biodegradable pollutants are those that cannot be decomposed by biological processes or take a very long time to degrade. Pesticides (such as DDT), plastics, heavy metals, and glass fall into this category.

Synthetic pesticides are particularly harmful as they persist in the environment for long periods and can undergo biomagnification, increasing in concentration as they move up the food chain.