Select the non-degradable pollutant (s) from the followings

• Plastic

• Organochlorine pesticides

• Heavy metals

• Domestic sewage

A.

Plastic

B.

Organochlorine pesticides

Pollutant is a substance that pollutes water or the atmosphere. It is classified into two types:

(i) Biodegradable pollutants are those that can be decomposed or degrades by microbes. They become a part of biogeochemical cycle and give back rapid tum over. e.g. domestic sewage, heavy metals.

(ii) Non-biodegradable pollutants are those that cannot be decomposed by· microbes and accumulate in the environment causing pollution. e.g. plastic and pesticides like organo chlorides (strong liphilic and nonbiodegradable nature).