THE STAR SCHOOL
ENGLISH 12

UNIT 4













Pre-reading activity
We are going to read a text about air pollution
Tell your classmates what you know about air pollution.
i.e. Smoke from vehicles cause air pollution
. . .

If you don’t know much about air pollution so what questions you would like to ask.

i.e. What causes air pollution ?
. . .
While reading activity
Read the text and find out words which mean :
A combination of smoke and fog :
Very small pieces :
Methane ( a kind of gas ) :
Inhale :
Chiefly :
Food for plants :

smog
particles
marsh gas
breathe in
mainly
fertilizers
Causes :
Let substance escape into the air :
A thin fog :
A smell usually unpleasant one :
Polluted, made dirty :
Take place, happen :
Steam :
account for
release
mist
odor
contaminated
occur
vapor
Comprehension check
A. True - False or not stated :

1. Clean air provide us with a healthy supply of oxygen
2. One example of air pollution is forest fires
3. Air pollution comes mainly from vehicles
4. Nitric oxide is a highly poisonous gas
5. A lot of petrol contains lead, which is very poisonous

6. Smog is a combination of fog and smoke
7. There is too much carbon dioxide in the air these days
8. Industrial smoke stacks throw out sulphur and carbon dioxide
9. Burning coal and oil releases other gases harmless to humans
10.Burning garbage and paper wastes also pollutes the air
B. Are you sure you read well ?


1. When wastes are poured into the _____ the air becomes _____ and unpleasant to _____ . This is ______ .

2. Examples of air pollution are ____ , ____ , and ____ .
3. Large amount of air pollution comes from _____.
4. _____ also account for air pollution. Another tailpipe emission is _____ .
5. Lead and smoke are emitted in _____ as _____ .


6. Smog also occurs in the atmosphere when _____ and _____ combine under the influence of _____ .
7. Industrial smoke stacks throw out _____ and _____ .
8. Burning oil and coal also releases ______ harmful to _____ .
9. ______ is produced in the manufactured of _____ and _____ .
10. Dangerous chemicals can be released from ______ or ______

C. Answer the questions
1. What is air pollution ?
2. What two gasses occur in the air naturally ?
3. What are some sources of air pollution in the cities ?
4. How do vehicles pollute the air in cities ?

5. Is lead harmful to our health ? Why ?
6. Where can smog be found ?
7. What does sulphur dioxide combined with water vapor and oxygen turn into ?
8. Why do burning gases and paper wastes pollute the air ?