Question

Question 31
Read the paragraph and answer the questions following it. Water is essential for life. Without water, there would be no life. We usually take water as granted for its purity, but we must ensure the quality of water. Pollution of water originates from human activities. Through different paths, pollution reaches to groundwater. Easily identified source or place of pollution is called as point source, e.g.– municipal and industrial discharge pipes, where pollutants enter the water source. Non–point sources of pollution are those where a source of pollution cannot be easily identified, e.g.– agricultural run off, acid rain etc.
(i) How do you classify the various sources of water pollution?
(ii) What are the point sources of water pollution?
(iii) Name any two non-point sources of water pollution?

Answer 1

(a) Various sources of water pollution are classified as point sources and non-point sources.
(b) The sources or places of pollution which are easily identifiable are point sources of water pollution. e.g. factories, power plants, etc.
(c) Agricultural run-off and acid rain are non-point sources of water pollution.