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प्रश्न
What are natural reasons for water pollution?
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उत्तर
The natural reasons of water pollution are:
- Presence of aquatic weeds which depletes the oxygen content of water bodies.
- Excessive algal growth.
- Mud and sludge which are added to water bodies due to river currents and their diversions.
- Growth of microbes like bacteria and fungi on dead and decaying matter present in water bodies.
संबंधित प्रश्न
_________ is used for desalination of brackish water.
Classify the given sources of water pollution as natural and manmade:
(1) domestic waste
(2) dead animals
(3) oil spills
(4) ashes released due to forest fires
Study the picture given below and answer the following questions :
Water pollution
Water in the sea is sweet.
Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?
Water sample is called cleanest on the basis of which one of the BOD values is given below.
Liquid kitchen waste alone constitutes the sewage.
Industrial wastes mainly consist of chemical pollutants.
Thermal power plants give out a lot of hot waste water.
Hot water discharged into water bodies hardly affects the fish and other aquatic life.
