Question

Biodegradable pollutant is
(A) plastic
(B) asbestos
(C) sewage
(D) mercury

Answer 1

Hint: Biodegradable pollutant is a type of pollutant which causes pollution and at the same, it can be degraded after a particular time. The Microorganism breaks down the pollutants naturally. The biodegradable pollutants are not generally harmful to the environment.

Complete answer:
Each and every man-made material or equipment is divided into two categories namely biodegradable and non-biodegradable. The biodegradables are the substances that can degrade in nature in course of time and non-biodegradables do not degrade in nature, some non-biodegrades take centuries of time to start degrading.
(A) Plastic is a non-biodegradable material.it takes 10 -1000 years of time based on their quality and composition.so this option is wrong.
(B) Asbestos sheets used in the roofing and siding of all types of buildings, factories, and farms. Because the fibrous cement is highly water-resistant than drywall, flat sheets of asbestos cement are used in interiors of homes and underlayment for flooring. Since the asbestos is good water-resistant material, it is non-biodegradable in nature. So this option is wrong.
(C) Sewage is composed of organic waste expelled by various organisms. Sewage is often used as fertilizer. Sewage materials are naturally biodegradable in nature. So this option is correct.
(D) Mercury is a liquid metal.it stays in a liquid state at room temperature and stays in the solid-state in cold conditions. Mercury is very potent to living organisms and it is used in the various equipment manufacture. It is a non-biodegradable material. So this option is wrong.

The correct answer is (C) sewage.

Note: Biodegradables are capable of being broken down specially into innocuous products by living things like microorganisms. It is eco friendly. Nowadays plastic is also considered as biodegradable material since it is made from flora materials.