What is a dam? Write two main advantages and two ill-effects of constructing a big dam. [Delhi(C)]
Dams are massive barriers built across rivers and streams to confine and utilise the flow of water for human purposes such as irrigation and generation of electricity.
Two main advantages of constructing a big dam are:
Two ill-effects of constructing a big dam are:
Suggest any four changes that you would like to incorporate in the life style of students of your age to move towards a sustainable use of available resources. [All India Delhi 2008(C)]
List any four disadvantages of using fossil fuels for the production of energy. [All India]
How would these advantages differ from the advantages of using a long-term perspective in managing our resources?
Give two examples each of the following:
Name any four categories of people who depend on the forest resources, mentioning major needs of each category. [Foreign]
What are non-renewable resources of energy? Give two examples of such resources. [Delhi]
Name the products of combustion of fossil fuels like coal and petroleum products. How do they affect us and our environment ?
Which of the two is a better option, (i) to collect rainwater in ponds or artificial lakes, or (ii) to let it recharge groundwater by water harvesting? List two advantages of the option to justify your answer. [Foreign]
Why is the process of ‘reuse’ better than that of ‘recycling’ ?Why is the process of ‘reuse’ better than that of ‘recycling’ ?
Suggest three ways to maintain a balance between environment and development to survive. [Delhi]
State any four personal choices you would like to make to reduce energy consumption without affecting the quality of life or work explaining how each one of them would help you to do so. [Foreign]
Although coal and petroleum are produced by the degradation of biomass, even then we need to conserve them. Why ?
List any two causes of our failure to sustain availability of underground water.[Foreign]
State the meaning of “sustainable management”. Reuse is better than recycling. How? [Foreign]
How did ‘Chipko Andolan’ ultimately benefit the local people? Describe briefly. [Foreign]
State whether the following statement is true or false :
Chipko Andolan was associated with the conservation of wild animals such as tigers and lions.
(a) State the advantages of constructing dams across the rivers.
(b) Describe some of the problems associated with the construction of dams.
(a) What is meant by rainwater harvesting ? Name some of the ancient structures used for rainwater harvesting by the rural people.
(b) What are the various advantages of water stored in ground ?
Although coal and petroleum are produced by degradation of biomass, yet we need to conserve them. Why?
(a) Locate and name the water reservoirs in figures (a) and (b).
(b) Which has an advantage over the other and why?
With which process are the following ancient structures associated ?
Kulhs, Eris, Surangams, Kattas, Pynes
(a) What is a natural resource ? Name three important natural resources.
(b) Why do we need to manage our natural resources ?
(a) Name any five sources of water (other than rivers)
(b) Describe how, the water of river Ganga has been highly polluted.
In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the water body was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.
Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
State an instance where human intervention saved the forests from destruction. [Delhi(Q)]
Why must we conserve our forests? List any two causes for deforestation to take place. [Delhi]
How do advantages of exploiting natural resources with short-term aims differ from the advantages of managing our resources with a long ¬term perspective? [Foreign]