Protecting Our Environment,Chapter -07

BANGLADESH AND GLOBAL STUDIES.
Class - Three.
Chapter - 07.
Protecting Our Environment against Pollution.
***Give Long Answer :
1. Why should we preserve our environment?
Ans: Environmental pollution creates different problems in the lives of humans and other animals.Different kinds of animals, birds,fish and trees are being destroyed because of air pollution. Bad smell comes for throwing garbage here and there.Dirty swamps or trash around houses and schools breed mosquitoes and flies. And as a result different kinds of diseases spread from there. Diarrhoea,Jaundice break out if the water is polluted. It is difficult to hear if there is loud noise. We depend on agriculture for our food.Earth pollution leads to poor harvest. Trees die That is why we should preserve our environment.
2. How is environment polluted?
Ans: A healthy environment makes the lives beautiful of humans and other animals. But the environment is being polluted for different reasons.For example ------
1. People throw banana peel on the road, play ground or on the pond and river.
2. People spit and throw cough everywhere people excrete anywhere.
3. People use a lot of insecticide on the rain washes the insecticides from the cultivable lands and flow into the river.
4. Black smoke comes out of cars and brick fields.Vehicles and industries are a source of noise.
5. Sometimes people play music in loud volume. Like this earth, water, air and sound are being polluted and This is called Environmental Pollutin.
*** Give short answer :
1. Give two causes of air pollution.
Ans: Two causes of air pollution are given below :
a) Throwing spit and cough everywhere.
b) Black smoke emits from vehicles and factories.
2. Give two causes of water pollution.
Ans: Two causes of water pollution are given below :
a) People throw household and industrial garbage into rivers and other water bodies.
b) Excessive insecticide are used in agriculture fields and it is washed away by rain water.
3. What is the result of too much noise?
Ans: Headaches and loss of hearing are the result of too much noise.
4. Why should we drop rubbish?
Ans: We should drop rubbish in dustbin or right place.
5. How do animals suffer from our pollution?
Ans: Due to environment pollution birds and animals loss their nest.Sometimes they loss their lives due to excessive pollution.
6. What is Environmental pollution?
Ans: Whatever we have around us is called our environment. The natural environment may heve affected for various reasons. When this happens,we calls it environment pollution.
*** Fill in the blanks :
1. We ---------------- the cause of pollution.
2. We should ---------------- action to stop it.
3. We should not spit, ---------------- or ---------------- in public place.
4. We should keep our houses ----------------.
5. We can throw our rubish in proper ----------------.
6. A healthy environment makes the ---------------- beautiful of humans.
7. Diarrhoea and Jaundice breaks out if the ---------------- is polluted.
8. People are having different ---------------- because of environmental pollution.
*** Choose the correct answer :
1. What problem do we have because of air pollution?
Ans: breathing problem.
2. What should we avoid?
Ans: using polythin.
3. Where will we throw our waste?
Ans: right place.
4. The pollution responsible for mental disorder is ----------------
Ans: sound pollution.
5. Which element is emitting in the air?
Ans : Carbon di-oxide.
6. What is mixing with waste?
Ans: industrial waste.
7. How is the environment of the cultivable land destroyed?
Ans: using insecticide.
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