Sr. No.

Questions Marks

Q.1

Explain in detail conventional (non-renewable) and non conventional (Renewable) energy sources. (2/1/2009) & (8/1/2010) & (7/4/2010) & (10/10/2011)

OR Discuss the conventional and nonconventional energy resources with their impact on environment. (28/5/2012)

06 07

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Neotech Technical Campus Neotech Institute of Technology

Academic Year 2013-14 Semester : 1

Name of Subject: Environmental Science (2110007) Assignment No.: 5 Name Of Faculty: Ruchi P. Barve

Q.2

Ans

What are the effects on environment due to extraction of mineral resources? (2/1/2009)

T he scale and level of requirement of minerals have increased manifold in our country and it is heading towards the stage where much larger consumption of minerals will be inevitable to sustain even the minimum growth rate of our economy.

It is pertinent to note that out of the total land area of the country (3.29 million sq. kms.), the area leased out of mining, as on 1.9.94, was 7126.13 sq. kms. Comprising about 9,213 mining leases excluding atomic minerals, minor minerals, petroleum and natural gas this constitutes only about 0.25 per cent of the geographic area of the country and that including atomic minerals and minor minerals it may be around 0.28 per cent of the total area.

Although the area occupied for mining activity is small yet the damage to the environment on account of mining is causing grave concern. Environmental degradation resulting from mining activity in general can be briefly enumerated as follows:

1. Air pollution with dust and gases due to drilling, blasting, mine haulage and transportation by road, and also from waste heaps;

2. Water pollution when atomic elements and other harmful elements are present in the ore/mineral mine effluents;

3. Modifying water regimes such as surface flow, groundwater availability and lowering down of water table;

4. Soil erosion, soil modification with dust and salt;

5. Noise and vibration problem in the mine and adjoining habitat including wild life;

6. Alteration of the landform;

7. Deforestation affecting flora and fauna; and

8. Spoiling aesthetics with untreated waste dumps.

The impact of mining in environmental degradation has been receiving attention in recent years.

An overwhelmingly large number of small mines being open pit mines, land degradation including deforestation take place consequent to mineral exploitation where the extent of damage caused by mining may not be significant individually, the cumulative effect, especially by a cluster of mines, becomes fairly large.

Air pollution is quite common due to blasting and transportation of minerals and very largely by crushing units where such crushing is essential for marketing the mineral.

Even unestablished waste dumps cause air pollution and wash off during monsoon. Over burden and waste generated during mining, degrade land and can pollute adjoining farmlands and water sources.

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Q.3 Write advantages and disadvantages of solar energy. (20/3/2009) & (10/10/2011) & (12/1/2013)

3.5

Q.4 What are environmental problems of nuclear power plants? (20/3/2009)

3.5

Q.5

Write a short note on environmental problems associated with coal based thermal power plants. (20/3/2009) &(4/7/2011) & (12/1/2013)

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Q.6

Describe Conventional and Non-conventional energy resources with Environmental Problems created by use of each of them. (16/6/2009) Same as Answer 1

05

Q.7

Write the advantages and disadvantages of conventional and Nonconventional energy sources (11/9/2009)

04

Q.8 Comment on the urban energy problems and discuss the effect of overpopulation over energy problems in India. (8/1/2010)

07

Q.9 Write a short note on Overexploitation of Energy resources. (7/4/2010)

3.5

Q.10 What is energy conservation? Why do we need to conserve energy? (4/12/2010)

07

Q.11 Explain the conventional and non conventional energy resources. Discuss use of solar energy in India. (4/7/2011) & (10/10/2011)

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Q.12 Write a note on geothermal and tidal energy (6/6/2013)

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