The pollutants which are already present in nature but are released in substantial amounts by man are known as

A. Quantitative pollutants

B. Qualitative pollutants

C. Degradable pollutants

D. Primary pollutants

Answer: Option A

Solution(By Examveda Team)

The pollutants which are already present in nature but are released in substantial amounts by man are known as Quantitative pollutants.
These occur in nature and become pollutants when their concentration reaches beyond a threshold level. E.g. carbon dioxide, nitrogen oxide. CO₂ is present in the environment in greater quantities than normal.