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Environmental Issues

Short Answer Type

61. How are solid waste disposed by the use of saniitary landfills? Why is it not

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Long Answer Type

62. What measures are taken for disposal of solid wastes ?

215 Views

Short Answer Type

63. What is reforestation ?

124 Views

Long Answer Type

64.

Discuss the causes and effects of global warming. What measures need to be taken to control global warming?

477 Views

Short Answer Type

65. A decade back, the enormous vehicular traffic in Delhi had made Delhi rank 4th among polluted cities of the world. Two measures taken by the Delhi Government brought marked improvement in air quality by 2005.
1.What were these two measures and how did they reduce air pollution ?

2. What is the norm set by Euro II for petrol and diesel vehicles ?

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66. A factory drains its waste water into the nearby lake causing algal bloom.
(a) How was the algal bloom caused ?

(b) What would be the consequences ?

(c) Give the term for the cause of it.

(a) Algal bloom is caused due to enrichment of water with nutrients such as nitrogen and phosphorus. As the fertility increases plant life increases.

(b) Water becomes unfit for aquatic fauna because of less oxygen, scum and unpleasant odour.

186 Views

67. Why is the use of unleaded petrol recommended for motor vehicles equipped with catalytic converters ?

307 Views

Long Answer Type

68. What are various constituents of domestic sewage ? Discuss the effects of sewage discharge on a river.

335 Views

69.

Write critical notes on the following:

(a) Eutrophication
(b) Biological magnification
(c) Groundwater depletion and ways for its replenishment

651 Views

Short Answer Type

70. Discuss the role of women and communities in protection and conservation of forests.

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Previous Year Papers

Test Series

Test Yourself

Short Answer Type

Long Answer Type

Short Answer Type

Long Answer Type

Short Answer Type

66. A factory drains its waste water into the nearby lake causing algal bloom. (a) How was the algal bloom caused ? (b) What would be the consequences ? (c) Give the term for the cause of it.

Long Answer Type

Short Answer Type

66. A factory drains its waste water into the nearby lake causing algal bloom.
(a) How was the algal bloom caused ?

(b) What would be the consequences ?

(c) Give the term for the cause of it.