Question

Which of the following is a non-biodegradable pollutant?

• A. Sewage
• B. Garbage
• C. DDT
• D. Livestock waste

Answer 1

The correct option is C DDT

Biodegradable pollutants:
The pollutants which can be broken down into simpler, harmless, substances in nature in due course of time (by the action of micro-organisms like certain bacteria) are called biodegradable pollutants.
Examples:-Domestic wastes (garbage), urine, fecal matter, sewage, agriculture residues, paper, wood, cloth, cattle
dung, animal bones, leather, wool, vegetable stuff or plants are biodegradable pollutants.

Non-biodegradable pollutants:
The pollutants which cannot be broken down into simpler, harmless substances in nature, are called non-biodegradable pollutants.
Examples:- DDT, plastics, polythene bags, insecticides, pesticides, mercury, lead,arsenic, metal articles like aluminum cans, synthetic fibers, glass objects, iron products and silver foils are non-biodegradable pollutants.