Q4 of 37 Page 115

What measures would you take to conserve electricity in your house?

Following measures can be taken for conservation of electricity in my house:


(a) Switching off all the electrical appliances, fans and tube lights when they are not in use.


(b) Saving electricity by limiting the use of electricity for example, in day time tube- lights and fans can be switched off. Instead, window should be open to get the light and air.


(c) Limiting the use of appliances like T.V., and Air conditioners.


(d) Replacing all the 100 watt bulbs with LED tube-light which consumes less power.


(e) Avoiding the use of lighting for decoration during any festival.


(f) Limiting the use by not wasting electricity where it is not necessary to use.


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2

List two advantages associated with water harvesting at the community level.

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In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilizers 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. Analyses the situation and give reasons for excessive growth of plants and death of fish in the lake.

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Although coal and petroleum are produced by degradation of bio- mass, yet we need to conserve them. Why?

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Suggest a few measures for controlling carbon dioxide levels in the atmosphere.