Nuclear fuels produce pollution by …………….. .

1. heat
2. end products
3. wastes in coolants
4. All of the above.

Assertion (A): Eighty per cent of marine pollution comes from land.

Reason (R): Mining for materials such as copper and gold is a major source of contamination in the ocean.

1. Both A and R are true and R is one of the reasons for A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

What is environmental pollution? What is a pollutant?

Give the difference between natural and man-made pollutants.