UNIT 91. Read and match.

1. water pollution

2. cut down trees

3. turn off the lights

4. rubbish

5. recycle

6. plug

7. air pollution

8. waste water

9. electrical devices

A B C

D E F

G H I

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UNIT 92. Read and choose.

To save our world We should We shouldn’t

save energy

throw litter waste water

use less water

unplug electrical devices

cut down treesharm animals

recycle batteries

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UNIT 93. Read and choose.

1. You shouldn’t waste energy to save our world.

2. When you leave the room, you shouldn’t turn off the lights.

3. Unplug the TV when you don’t watch it.

4. You should use less water.

5. You should cut down trees to reduce pollution.

6. We can throw our garbage on the streets.

7. When we brush our teeth, we should leave the water running.

8. We should recycle batteries.

YES NO

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UNIT 94. Fill in the blanks.

1. We shouldn’t ................................ water and electricity. They are very important for life.

2. People ................................ trees to build new houses.

3. You shouldn’t throw away the rubbish into the sea because it ................................. the

sea animals.

4. We should ................................ energy because it helps the environment.

5. You can ................................ metal, glass and paper and use them again later.

6. Can you please ................................ off the TV when you don’t watch it?

7. My sister always ................................ the lights when she leaves the room. She is

environmentally-friendly.

8. We should use public transportation if we want to ................................. air pollution.

harms

recycle

unplug

cut down

turn

waste

reduce

save

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