拯救地球(ppt)正式版

1. Many parts of the world with large population and plenty of crops have become desert.(T)
2. 2. Land may become poor if farmers do not limit their cattle.(T)
W In some places it’s no longer
A safe for swimming, nor is it
T safe to eat the fish.
E Lake Baikal, which used to be
R
the cleanest in the world,is now polluted.
Saving the earth
Lesson 34 Unit 9 Earth, Air and Water
USA Alska
Lake Baikal
Germany Mediterranean Sea
Russia Dunhuang
ChinaGebi
Leabharlann Baidu
India
EARTH
AIR
WATER
1. Many parts of the world with large population and plenty of crops have become desert.
Causes
Suggestions
Phenomena
Causes
Suggestions
E The area of desert is growing A every year. R T Good soil is gradually lost. H
Air is being polluted.
A A lot of people died from
Limit the number of the cattle.
Plant more trees and try to protect them.
Factries,power stations and cars produce a lot of waste. There are serious accidents that polluted the air.
Air is being polluted.
A lot of people died from A polluted air in both Russia and I India.
R Trees in the forest are destroyed and fish in the lakes are killed.
polluted air in both Russia and
I India. R Trees in the forest are destroyed
and fish in the lakes are killed.
Cattle eat grass.
Trees being cut down; strong winds blowing the valuable soil away.
5. 5. Chemicals in the smoke from power stations can travel hundreds of miles before falling down to the rain.(F)
6. 6. After a bad accident at a nuclear power station, 50%of the trees in Germany were damaged.(F)
2. 2. Land may become poor if farmers do not limit their cattle.
3. 3. Good soil is gradually lost these days as trees are being cut down.
4. 4. Air pollution and water pollution are the two causes of problem that many parts of the world have become desert.
7. 7. The writer uses the examples of the accidents in both India and Russia to explain how water is polluted.(F)
Phenomena
E The area of desert is growing A every year. R T Good soil is gradually lost. H
5. 5. Chemicals in the smoke from power stations can travel hundreds of miles before falling down to the rain.
6. 6. After a bad accident at a nuclear power station, 50%of the trees in Germany were damaged.
3. 3. Good soil is gradually lost these days as trees are being cut down.(T)
4. 4. Air pollution and water pollution are the two causes of problem that many parts of the world have become desert.(F)
7. 7. The writer uses the examples of the accidents in both India and Russia to explain how water is polluted.
8. 8. Once oceans are polluted, they are not able to clean themselves.