2
B. Answer the following questions:
Why is there life on the earth?
What factors pollute the air on the earth?
1.
2.
?
What is meant by global warming? How can it be harmful?
4.
5. What precautions should be taken to remain in tune with nature?
Answers
Answer:
Because the atmosphere of. earth is suitable for living
answerer 1 the life on the earth is possible because of its great resources it has a great quantity of water which is essential for the survival ofhuman beings and other living organism. And also it has Oxygen for animals And carbondioxide for the survival of plants .
It has ozone layer which protect the Earth surface from the harmful rays of the Sun.
answer2: the factors that pollute the Air on the earth are smoke, fumes and harmful gases.The human beings are responsible for this pollution
answer 3 global warming refers to the increasing quantity of carbon dioxide in the earth this increases the temperature which is harmful for living organism. It is one of the major factor for the depletion of the ozone layer surface which protect the Earth surface from the harmful rays of the Sun.
answer 4. the following precautions must be taken taken by us to protect the earth we must try to plant more and more trees this will help us tu to clean the air of the surface. we should try to keep our resources conserved. we should keep our environment clean also so we must not use the the vehicles ,which produce smoke this will increase the air pollution, air pollution must be controlled.