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प्रश्न
Excessive use of chemical fertilizers depletes the soil and causes water pollution.
पर्याय
True
False
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उत्तर
Excessive use of chemical fertilizers depletes the soil and causes water pollution- true.
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संबंधित प्रश्न
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 :
Name one pollutant that causes the above the pollution.
Study the picture given below and answer the following questions :
State one measure to control this pollution.
Explain the following :
(i) Eutrophication ;
(ii) Biomagnification
A lot of fish are dying near a sea shore. Describe any two possible causes.
Usage of chemical pesticides and fertilisers causes ________ pollution.
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?
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.
BOD is measure of ______.
Liquid kitchen waste alone constitutes the sewage.
