I. Complete the following-
1. Farmers use chemicals to ______________________.
2. Air pollution increases the level ___________________.
3. Pollution is a big __________________.
4. We, the human beings are the only living things who ____________________
5. Efforts to control pollution of air ____________________.
II. Give two examples of each of the following:-
1. Natural sources of energy
____________________ __________________
2. Diseases caused by noise
____________________ __________________
3. Diseases caused by drinking polluted water
____________________ __________________
4. Diseased caused by air pollution
____________________ __________________
5. Non–living things that are a part of the environment
____________________ __________________
6. Sources of air pollution
____________________ __________________
Answer the following questions-
1. What is pollution? What are the different kinds of pollution?
Ans. __________________________________________________
2. Which human activities are damaging the environment?
Ans. __________________________________________________
3. What are the main causes of water pollution?
Ans. __________________________________________________
4. What is acid rain?
Ans. __________________________________________________
5. How can we reduce air pollution?
Ans. __________________________________________________
6. What are natural resources? give some examples.
Ans. __________________________________________________
7. What is environment?
Ans. __________________________________________________
8. What is global warming?
Ans. __________________________________________________
9. Which layer protects us from sun’s ultraviolet rays?
Ans. __________________________________________________
10.How do ultraviolet rays harm us?
Ans. __________________________________________________