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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
Have you ever observed any water pollution in your area? What measures would you suggest to control it?
Clear, transparent water is always fit for drinking. Comment.
Explain the following :
(i) Eutrophication ;
(ii) Biomagnification
Fill in the Blanks:
The release of hot water into rivers causes ______.
Give few steps to save water.
How can we reduce water pollution?
Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes:
(i) enhanced growth of algae.
(ii) decrease in amount of dissolved oxygen in water.
(iii) deposition of calcium phosphate.
(iv) increase in fish population.
Liquid kitchen waste alone constitutes the sewage.
Household detergents are safe and non-contributors to water pollution.
Define the following term:
Oil spills
