Question

Which of the following statements is correct?

• A. Primary pollutants are more harmful than secondary pollutants
• B. Primary pollutants and secondary pollutants are equally harmful
• C. Secondary pollutants are more harmful than primary pollutants
• D. $DDT$ is a secondary pollutant

Answer 1

Answer: (C)

Primary pollutants persist in the form they are released in the environment. Secondary pollutants are formed by reaction amongst the primary pollutants. Secondary pollutant are more toxic than primary pollutants. $DDT$ is a primary pollutant.