LESSON 13 P1 --- Save Nature

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Save Nature
In our everyday life, water, air and land matter a lot. We drink water, breathe air and walk on land. We can tell whether the water we drink has a peculiar taste, is colourless of it has an odour which is unpleasant. The air we breathe has dust and smoke. The land we walk on is dirty and spoiled. All this is due to the fact that we are facing serious problems of pollution.
There are many types of pollution: water pollution, air pollution, land pollution and noise pollution. The fast growing population, increased number of factories and industries, and a large number of smoking vehicles are the main causes of pollution.
Water pollution takes place when it gets mixed with unclean and filthy matter due to poor drainage and sanitation system. Very often filthy water, containing human and animal waste, and poisonous chemicals, is mixed with drinking water. This dirty water is absorbed by land and reaches the underground storage of water. It is then supplied to public by the tubewells as drinking water. This dirty water also pollutes the nearby lakes, canals and rivers. Thus nature's main sources of ground and surface water are also affected.
Land pollution takes place when people dispose of their waste on the land. The improper disposal of the waste material results in a number of problems. When it rains, the rain water seeps through the soil. The waste dissolves and carries with itself harmful materials which pollute the soil.
Air pollution is the most dangerous type of pollution and also very difficult to control. It is spread allover. Its effects on human health are wide ranging and very dangerous.
Noise pollution is also causing problems in the densely populated areas. Excessive use of vehicle horns and loud music beyond a safe level damages the ear drums.
Environmental protection department is taking measures to control pollution. We, as citizens, must feel and take upon ourselves the responsibility to keep our environment clean which is also a religious obligation.
We must grow trees and protect the existing plants and trees. It is observed that most of the people clean their own places, houses and buildings, but throw garbage into the street or on the roads. It is the duty of each one of us to put the trash into the dust bins and keep our environment clean.
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EXERCISES
Q;1 Answer the following questions.

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i) How many types of pollution are mentioned in the lesson?
Ans: The following types of pollution are mentioned in the lesson: water pollution, air pollution, land pollution and noise pollution.

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ii) How does water pollution take place?
Ans: Water pollution takes place when it gets mixed with unclean and filthy matter due to poor drainage and sanitation.

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iii) Give in detail what happens when rainwater seeps through the soil.
Ans: When it rains, the rain water seeps through the soil. The waste dissolves and carries with it harmful materials which pollute the soil.

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iv) What steps can you take to reduce land pollution?
Ans: We should recycle or dispose of the waste material carefully.

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v) What are the main health hazards which can be caused by poisonous gases?
Ans: Poisonous gases cause harmful diseases like cancer, heart failure, paralysis etc.
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i) What is noise pollution and how is it damaging the human senses?
Ans: Noise pollution is caused by unnecessary and excessive use of motor vehicle horns and exceedingly loud sound of music. It damages not only our hearing but also the whole nervous system.

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ii) How are trees and plants affected by pollution?
Ans: Water pollution and land pollution have a bad effect on the fertility of the soil and thus trees and plants are destroyed.
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iii) How can we save nature in its original form?
Ans: We can save nature by reducing or eliminating pollution. We should fulfill our responsibility to keep our atmosphere clean.

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iv) How can we keep our surrounding clean? Write a paragraph of 100 words.
Ans: We can keep our surrounding clean following these steps.
1) We should through the trash in the dustbins.
2) We should make arrangements to keep the water clean.
3) We should boil or filter water before we use it.
4) We should make the use of vehicles horns as little as it is possible.
5) If we want to enjoy music we should hear it at a very low volume
6) We should dispose of the waste material that cannot be recycled very carefully. So that it may not add to any type of pollution.
7) We should enforce the industrialists to set up their mills and factories out of the city area.
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Q:2 Change the tense as indicated in brackets.

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i) Clouds are formed and it rains (Past)
Ans: Clouds were formed and it rained.

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ii) Land pollution occurs when people dispose of their waste on land. (Future)
Ans: Land pollution will occur when people will dispose of their waste on land.
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iii) The police must challan the smoke producing vehicles. (Past)
Ans: The police challaned the smoke producing vehicles.

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iv) We are facing serious problems of pollution (Future)
Ans: We shall be facing serious problems of pollution.
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v) We will grow trees and plants (Past)
Ans: We did grow trees and plants.

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Q:3 Describe in your own words what can we do to reduce air pollution.
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We must grow trees and protect the existing plants and trees. It is observed that most of the people clean their own places, houses and buildings, but throw garbage in the street or o n the roads. It is the duty of each one of us to put the trash in the dust bins and keep our atmosphere clean.
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Q:4 Fill in the blanks with appropriate to prepositions from the list given:
(of, with, through, on)

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i) The land we walk on is dirty.
ii) We are facing serious problems of pollution.
iii) Chemicals are mixed with water.
iv) The main source of water is also affected.
v) The rain water seeps through the soil.

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