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प्रश्न
What is meant by water pollution?
थोडक्यात उत्तर
उत्तर
Water pollution refers to the addition of any substance to water that may cause changes in its physical and chemical properties and interfere with its use for legitimate purposes. The following are indications that water is polluted:
1. Bad taste or offensive odour
2. Reduction in number of aquatic lives in rivers, fresh water, seas.
3. Oil or grease floating on the surface of water.
4. Unchecked growth of aquatic weeds.
5. Outbreak of an endemic.
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Sources of Water Pollution
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