Consider the following statements:

1.Nitrogen, sulphur and carbon oxides are primary air pollutants contributing to acid deposition

2.Atmospheric pollutants are mainly present in the troposphere and lower stratosphere

3.Persistent pollutants remain long in the environment, while non-persistent ones break into simple products

AOnly statements 1 and 2 are true

BOnly statements 2 and 3 are true

COnly statements 1 and 3 are true

DStatements 1, 2 and 3 are true ✓ Correct

Correct answer: (D) Statements 1, 2 and 3 are true

Explanation

Statement 1 is correct, as nitrogen, sulphur and carbon oxides are primary pollutants that drive acid deposition.

Statement 2 is correct, since atmospheric pollutants concentrate mainly in the troposphere and lower stratosphere.

Statement 3 is correct, as persistent pollutants linger long while non-persistent ones break down into simpler products.

Acid deposition falls as both wet acid rain and dry particle settling.

All three statements therefore hold true.

DDT is a well-known persistent pollutant that accumulates through food chains.

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