Question

Q. Which of the following are non-point sources of pollution in rivers?

Select the correct answer using the code given below.

• A.
  1, 4 and 5 only
• B.
  2 and 3 only
• C.
  2, 3 and 4 only
• D.
  1, 2, 3 and 4 only

Answer 1

The correct option is B

2 and 3 only
Explanation:

Statements 1 and 4 are incorrect: A point source is a single identifiable localised source of something. Examples of point sources include sewage treatment plants; oil refineries; paper and pulp mills; chemical, automobile, and electronics manufacturers; and factories.

Statement 2 and 3 is correct: Nonpoint source pollution generally results from land runoff, precipitation, atmospheric deposition, drainage, seepage or hydrologic modification. As the runoff moves, it picks up and carries away natural and human-made pollutants, finally depositing them into lakes, rivers, wetlands, coastal waters and groundwaters.