JEFC Book 3 Unit 11 Lesson 42PPT课件

DO TRUE OR FALSE STATEMENT
1.The Great Green Wall is just the Great Wall. ( F )
2.China builds it across the southern part of China. ( F )
3.It can keep water from running away. It can save a lot of good land.
(T )
Para. 1:
Main idea: the importance of forests.
Topic sentence: Forests help to keep floods and droughts from happening.
Para.2~3: Main idea:
Something about the Great Green Wall
Shaanxi) and the western part of the
Northwest( Liaoning, Jilin and Heilongjiang). It
includes altogether 13 provinces, cities and
autonomous regions. Its total area is 4,069,000
THE UNITED
100
STATES OF
AMERICA
50% 50
33%
0
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1850
1
Look at the diagram. It shows us what has happened to the forests of the USA in the last 350 years. In 1620, about half the USA was covered by forests. In 1850, abut a third was covered by forests. Today, the forests have almost gone. A lot of good land has gone with them, leaving only sand. Today, too many trees are sill being cut down in the USA.
Topic sentence: Chinese people do not want to see more floods and droughts . So they have built a new Great Wall of trees across the northern part of the country.
shelter-forest” across the northern part, including
Inner Mongolia, Shannxi, Hebei, Beijing,and Tianjin.
The Great Green Wall also covers some of the
Northwest(Xinjiang, Qinghai, Gansu, Ningxia and
6. Stop lands from becoming deserts.
7.Offer birds and some animals homes .
8. Make our world more
beautiful.
10
What can forests do?
1.They help to keep water from running away.
2.Keep rain drops from hitting the soil directly..
3.The dead leaves on the ground keep the water from running away. In this way,floods and droughts can be stopped.
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16年后，大兴安岭将无木可伐。
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The flood of Changjiang River in 1998
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Questions
• 1） Have you ever heard of the Great Green Wall?
• 2) What do you know about the Great Green Wall
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THE GREAT GREEN WALL
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China has built a new Great Green Wall, “ Sanbei
Para.4~6:
Main idea: Something about Wang Feng , other workers and their work. What Wang Feng thinks about the Great Green Wall and his work.
THE GREAT GREEN WALL
square kilometers,which covers 42.4% of the land
of China. The building of the Great Green Wall will
take 73 years (1978—2050). The Great Green Wall
has already saved a lot of land. They are millions of
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trees, they’re forests.
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The functions（作用） of trees
1. Clean air .
2. Give us wood . 3. Produce oxygen ( 氧气). 4. Keep us cool in summer. 5. Hold soil and water