Question

Which of the following pollutants cannot be degraded by natural process?

• A. DDT
• B. Nuclear Waste
• C. Heavy Metals
• D. All of the above

Answer 1

The correct option is D All of the above

Pollutants which are slowly degradable remain in the environment in an unchanged form for many decades. For example, substances such as dichlorodiphenyltrichloroethane (DDT), plastic materials, heavy metals, many chemicals, and nuclear wastes etc., once released into the environment are difficult to remove. These pollutants cannot be degraded by natural processes and are harmful to living organisms. In the process of environmental pollution, pollutants originate from a source and get transported by air or water or are dumped into the soil by human beings.