Question

What is meant by the term ‘acid rain’. Give any two impacts of acid rain.

Answer 1

Acid rain: Oxides of sulphur [SO,] and nitrogen [NO,] present air mix with water [or snow, fog etc.] and fall down on the earth resulting in acid rain.
Two impacts of acid rain:

1. The water of lakes and rivers which is becoming acidic, may not support aquatic life.
   Acid rain damages the buildings and sculptural materials or marble, lime stone, slate, mortar etc.
2. These materials become pitted and weakened mechanically.