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高三英语课件:Saving the earth Lesson 34 Unit 9


Saving the earth
Lesson 34 Unit 9

Earth, Air and Water

USA Alska

Lake Baikal Germany Russia Dunhuang ChinaGebi Mediterranean Sea

India


EARTH

AIR

WATER

1. Many parts of the world with large population and plenty of crops have become desert. 2. Land may become poor if farmers do not limit their cattle. 3. Good soil is gradually lost these days as trees are being cut down. 4. Air pollution and water pollution are the two causes of problem that many parts of the world have become desert. 5. Chemicals in the smoke from power stations can travel hundreds of miles before falling down to the rain. 6. After a bad accident at a nuclear power station, 50%of the trees in Germany were damaged. 7. The writer uses the examples of the accidents in both India and Russia to explain how water is polluted. 8. Once oceans are polluted, they are not able to clean themselves.

1. Many parts of the world with large population and plenty of crops have become desert.(T) 2. Land may become poor if farmers do not limit their cattle.(T) 3. Good soil is gradually lost these days as trees are being cut down.(T) 4. Air pollution and water pollution are the two causes of problem that many parts of the world have become desert.(F) 5. Chemicals in the smoke from power stations can travel hundreds of miles before falling down to the rain.(F) 6. After a bad accident at a nuclear power station, 50%of the trees in Germany were damaged.(F) 7. The writer uses the examples of the accidents in both India and Russia to explain how water is polluted.(F) 8. Once oceans are polluted, they are not able to clean themselves.(F)

Phenomena
E A R T H The area of desert is growing every year. Good soil is gradually lost.

Causes

Suggestions

Air is being polluted.
A I R A lot of people died from polluted air in both Russia and India.

Trees in the forest are destroyed and fish in the lakes are killed.
In some places it’s no longer safe for swimming, nor is it safe to eat the fish. Lake Baikal, which used to be the cleanest in the world,is now polluted.

W A T E R

Phenomena
E The area of desert is growing A every year. R T Good soil is gradually lost. H
Air is being polluted.

Causes
Cattle eat grass. Trees being cut down; strong winds blowing the valuable soil away.

Suggestions
Limit the number of the cattle. Plant more trees and try to protect them.

Factries,power stations and cars produce a lot of waste.

A A lot of people died from polluted There are serious accidents air in both Russia and India. that polluted the air. I R Trees in the forest are destroyed
and fish in the lakes are killed. Chemical rain.

A lot of things have to be down to reduce pollutionn. New laws should de passed and people should
realize how serious the problem is. Same as above.

W A T E R

In some places it’s no longer safe Factories and cities for swimming, nor is it safe to eat produces a lot of waste. the fish. Lake Baikal, which used to be the cleanest in the world,is now polluted. Waste produced from a chemical factory.

The main idea of each passage
Earth: The area of desert is growing and
good soil is gradually lost.

a lot of damage and serious accidents took place from time to time. Water pollution is caused by man’s Water: waste. The waters of this great lake have been dirtied and 4800 square km of ocean were polluted by oil.

Air: Chemicals in the smoke cause

DISCUSSION

(1) What kind of pollution can you think of ? (2) Why trees are important? (3) What are the causes of water pollution? (4) What can be done to stop land from becoming into desert? (5) What else do we know about the problems that the earth is facing? (6) What steps should we take to save the earth?

So everybody should remember:
A lot of damage has already been done to the earth, including pollution, nuclear waste, radiation and so on. We are also aware that there is only one earth for us. So the idea that everyone should keep in his or her mind is stopping any damage to the world and saving the earth.

practice
Now you are a reporter from the 21st Century , when you are making a social survey in your home town, you see some factories in your home town are seriously polluting the air and the water. The environment is not well protected. You are going to Interview a government official and write a report about what you see. You are supposed to tell the Importance of stopping the pollution and Protecting the environment. Now do the interview first in pairs and then make an oral report according to the following pictures.


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