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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
What are the major causes of water pollution? Explain.
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.
List two major harmful effects of the following:
Rivers contaminated with sewage.
With reference to the sources of water pollutants answer the following question:
In what way does the industrial waste pollute water?
Classify the most significant sources of water pollutants.
A pond contains clean water. Which of the following activities will produce least pollution of water?
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. |
- How do you classify the various sources of water pollution?
- What are the point sources of water pollution?
- Name any two non-point sources of water pollution?
Give two examples of water pollutants.
Thermal power plants give out a lot of hot waste water.
