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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 ?

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Short Answer Type

63. What is reforestation ?

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Long Answer Type

64.

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

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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 ?

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

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Long Answer Type

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

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69.

Write critical notes on the following:

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

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Short Answer Type

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

Women and communities have played an important role in in protection and conservation of forests in the following way:

1. In 1731, Bishnoi community led by women Amrita Devi obstructed the cutting of trees by hugging the tree and asked the workers of king to cut her before cutting the tree. Her three daughters and hundreds of other Bishnois lost their lives in saving trees.

2. Chipko movement started by Chandi Prasad Bhatt and Sunder Lai Bahuguna of Silyara in Tehri region, when workers of contractor were not allowed to cut the trees by village people by hugging them.

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