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(共53张PPT)
Unit 3 The environment
Reading
1. What has Lo done
He has painted himself green.
2. What did Hi tell Lo to do
He told Lo to be greener.
3. Does Lo understand what Hi meant
No, he doesn’t.
4. What did Hi mean when he told Lo to be greener
He meant that Lo should care more about the
environment.
Part I Lead-in
What do the pictures tell us
They are surprised to see that a lot of trees have been cut down.
Heavy smoke from chimneys
and waste gases from cars or
trucks pollute our air.
Birds fly away because cutting down trees destroys their homes.
Lots of unrecyclable plastic lunch boxes are used and then thrown away by people. This creates mountains of rubbish and pollutes our land and seas.
Our world is in danger!
What do you know about …
What do you know about the greenhouse effect
Part II Pre-Reading
A1 What do you know about the greenhouse effect Match the first half of the sentences in column A with the second half in column B. Write the correct letters in the blanks.
e
f
b
d
c
a
The gases cause the atmosphere to keep in too much heat from the Sun.
The Earth is getting warmer and warmer.
We call this the greenhouse effect.
There is an atmosphere around the Earth.
It controls the Earth’s temperature.
However, we are polluting the Earth with harmful gases.
1
2
3
4
5
6
Read the following sentences.
Read the sentences in A1 and answer the questions.
1 What’s around the Earth
The atmosphere.
2 What are people polluting the Earth with
Harmful gases.
3 What are the effects of the harmful gases
They cause the atmosphere to keep in too much
heat from the Sun, and the Earth is becoming
warmer and warmer.
4 What do we call this
The greenhouse effect.
A2 What is the result of the greenhouse effect In groups, discuss this with your classmates.
Environmental problems.
The greenhouse effect, cutting down forests and
bad habits.
Before you read
A “green consumer” is someone who only buys and
uses things friendly to the environment.
1. What is the article mainly about
3. A consumer is someone who buys and uses things.
Can you guess what a “green consumer” is
2. What problems does the article discuss
The world is in danger
Our world is in danger. We must do something to protect the environment. But, what are the main problems we face
The greenhouse effect
The atmosphere around the Earth is necessary for all living things. It is like the glass of a greenhouse, letting sunlight in and keeping heat from getting out. Without it, the Earth would be the same as the Moon — cold and lifeless.
Part III While-Reading
When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide (CO2). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result of the greenhouse effect, the Earth’s temperature is increasing. This causes sea level to rise, and in the future may cause cities to disappear.
Cutting down forests
Every year, we destroy nature by cutting down huge areas of forests. This makes the greenhouse effect worse because trees take in CO2 and produce oxygen. Cutting down trees also destroys the homes of the animals that live in our forests, and causes the surface of the soil to be easily destroyed by rain. This can result in floods and even more damage to the environment.
Bad habits
Many of our habits cause pollution. People often use things once and then throw them away, or leave them on the ground as litter. This creates mountains of rubbish and pollutes our land and seas.
In order to protect the environment, we need to take proper action. We should be different from many consumers and become “green consumers”. This means that we should only buy and use products friendly to the environment. We should also recycle as many things as we can. We can reuse things for the same purpose as before, or we can use them for new purposes. If we just learn to live in new and different ways, we can make a difference.
The world is __________.
1: ____________
______________
2: ____________ ______________
3: ____________
Solution: We need to _____ ____________.
Read the text and finish the chart.
in danger
The
greenhouse effect
Cutting down
forests
Bad habits
take
proper action
Main problem
Why must people do something to
protect the environment
What are the main problems people
face
What should people do to protect
the environment
Read the text and answer the questions.
Because our world is in danger.
The greenhouse effect, cutting down forests and bad habits.
People should become “green consumers”.
C1 The words in italics explain the meanings of some words on page 35. Find these words to complete the sentences. Change their forms if necessary.
1. __________ the flood, many people were left
homeless. (because of the effect of)
2. The world population will continue to ______
for many years to come. (to become greater in
number)
Vocabulary
As a result of
increase
3. The mountain is high. It is 3,000 metres above _______. (the height of the ocean)
4. Man first walked on the _______ of the Moon in 1969. (the top part of an area of land)
5. There were __________ toys in the shops during the Christmas holidays. (a very large number of)
sea level
surface
mountains of
Mark: The burning and cutting down of trees all over
the world _______________________ the loss of our
forests. Why do you think people do that
Jenny: The world’s population is growing fast. That’s
probably the main reason. People need land to live on.
C2 Complete the conversation below with the words from the box. Change their forms if necessary.
in danger make a difference take action increase result in
is resulting in / results in
Mark: I suppose so. But forests are important to us.
Trees take in CO . When so many trees are being
cut down, the CO in the Earth’s atmosphere
_______. This causes the temperature to rise
and puts the world ________.
Jenny: To _______________, we need to stop cutting
down so many trees, and we should use as few
wood products as possible.
Mark: You’re right. Everyone should __________ to
protect the Earth.
increases
in danger
make a difference
take action
Comprehension
D1. Replace the italicized words with information from the article on page 35.
1. The writer says that it is in danger.
2. It is necessary for all living things.
3. CO comes from burning them.
4. This causes sea level to rise.
5. It causes the surface of the soil to be easily destroyed by
rain.
6. Many of our habits cause this.
The atmosphere around the Earth
The increasing temperature
Cutting down trees
pollution
fuels such as petrol and coal
our world / the Earth
D2. Read the article again and circle the correct answers.
1. Because of pollution, ______.
a. not enough sunlight is reaching the Earth
b. not enough heat is leaving the Earth
c. not enough CO is leaving the Earth
2. If there are more trees, the amount of CO in the atmosphere will be ______.
a. greater b. less c. the same
b
b
3. We can help protect the environment if we ______.
a. change our bad habits
b. become consumers
c. buy more products
4. The purpose of the article is to make ______.
a. people do more to protect the environment
b. more people become consumers
c. people learn more about the environment
a
a
D3. The writer gives an example of a bad habit that causes pollution. Can you name some other bad habits that cause pollution
atmosphere n. 大气层
temperature n. 温度；气温
*consumer n. 消费者
guess v. 猜测
green adj. 环境保护的；赞成环境保护的
lifeless adj. 无生命的；无生物生长的
fuel n. 燃料
coal n. 煤
result n. 结果
New words (Reading)
increase v.（使）增长；增多；增加
sea level n. 海平面
destroy v. 摧毁；毁灭
nature n. 自然界；大自然
surface n. 表面；表层
soil n. 土壤
flood n. 洪水；水灾
habit n. 习惯
proper adj. 正确的；恰当的
friendly adj. 无害的
recycle v. 回收利用
purpose n. 目的；用途
1. greenhouse effect 温室效应
2. in danger 在危险中
3. as a result of 由于
4. result in 造成；导致
5. mountains of 许多；大量
6. take action 采取行动
7. make a difference 有作用；有影响
短语收藏夹（Reading）
带*的是学过的短语
*8. keep sb / sth from doing sth 阻止某人 / 某物做某事
*9. keep in 储存；储备
*10. cut down 砍伐
*11. throw away 扔掉；丢掉
*12. the same as 与……相同
*13. be different from 与……不同
*14. a large number of 大量的
*15. take in 吸收
*16. as ... as possible 尽可能……
We must do something to protect the environment.我们必须做些事来保护环境。
解析：do something to do ... 意为“做些事情……；采取措施……”，可与 take action to do ... 互换。例如：我们应该采取措施来保持教室干净。
We should do something to keep the classroom clean.
= We should take action to keep the classroom clean.
Language Points
... letting sunlight in and keeping heat from getting
out. ……让阳光进来并防止热量散发出去。
解析：let sb / sth in 意为“让某人 / 某物进入”，反义
短语：let sb / sth out “让某人/某物出去” 。例如：
请开门，让我进去。
Please open the door and let me in.
这狗太吵了，我想放它出去。
The dog is too noisy. I want to let it out.
Without it, the Earth would be the same as the
Moon — cold and lifeless.
没有它，地球就会和月球一样——寒冷且没生命。
We can reuse things for the same purpose as
before ...
我们可以像以前一样以同样的用途重新使用物品……
解析：the same as ... 意为“与……一样”，该短语可以拆开使用，即：the same ... as ...，same 后面接名词，意为“像……一样的……”。例如：
我的书包跟你的一样。
My school bag is the same as yours.
我有一个像这样的书包。
I have the same school bag as this.
Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat.
太多的这种气体会污染大气层，导致它保存了太多的热量。
keep in 在本句意为“贮存；储备”，相当于动词store。例如：
我们已经储存了一些食物以备紧急之用。
We have kept in some food for an emergency.
As a result of the greenhouse effect, the Earth’s
temperature is increasing.
由于温室效应，地球的温度正在上升。
解析：as a result of意为“由于”，可与because of 互换。as a result 意为“结果；因此”，表示结果，常置于句首。例如：
他因车祸而受了伤。
He was hurt as a result of the car accident.
= He was hurt because of the car accident.
结果是他测验不及格。
As a result, he failed the test.
If we just learn to live in new and different ways, we can make a difference. 如果我们学会用新的和不同的方式生活，我们就能起作用。
解析：make a difference 意为“有影响；有作用”，
其反义短语为 make no difference 意为“没影响；没作用；没差别”。例如：
你选哪一个至关重要。
Which one you choose will make a difference.
他来不来对我没影响。
It makes no difference to me whether he will come
or not.
Answer the questions
1. Do you know what bad habits in our daily life will
destroy the environment
The paper / tissue we use; the plastic bags we use ...
2. How can we improve our habits to protect the
environment
We should use reusable bags when we go shopping;
we should use recycle paper ...
Part IV Post-Reading
5大坏习惯破坏地球环境
平均每杯经过滤的黑咖啡都会排放出约125克的二氧化碳。这些二氧化碳三分之二来自原材料，而其余则是来自制造的过程。一杯即溶咖啡含有约80克的二氧化碳，如果在咖啡中加入牛奶，那么从牛奶中所散发出来的甲烷将排放出更多的二氧化碳。
不只如此，根据环保组织WWF的统计数据，生产一杯拿铁中的咖啡、牛奶、糖和杯子，要用掉200升水。这意味着，如果每个人能少喝杯咖啡，无疑是对环保做出了巨大的贡献。
咖啡
美国人均每年使用23卷厕纸，那么整个国家的总数就是70亿卷。其中只有五十分之一是采用100％的可回收纸。这不仅对水和能源造成浪费，更是给北美洲的原始森林施加了更大的砍伐压力。而森林在生物多样化的支持和环境净化等方面，一直担任着重要的角色。
为此，森林管理委员会(FSC)想了个折中的办法，就是确保造厕纸的新木材纤维是来自可持续林业计划(sustainable forestry projects)，而不是那些已经受到威胁的古老森林。
5大坏习惯破坏地球环境
厕纸
在日常生活中，我们经常会丢弃很多哪怕只穿了几次的衣服。在英国，每年大约有100万吨的衣服被丢弃，其中大部分都被丢弃在垃圾堆或直接进入垃圾焚化炉里。事实上，这些衣服大部分还有七成新。
　　如果能减低这种快时尚的消费，对于那些要处理的衣服，我们至少可以考虑一些更环保的方法。
　　
5大坏习惯破坏地球环境
快时尚
研究发现，洗一件聚酯纤维衬衫，80％的二氧化碳都来自清洗及烘干过程。对于全棉的衣料，则需要消耗更多的能量及造成更大的碳排放。装满衣服的洗衣机每小时需消耗1.2千瓦的电，对衣物进行重复烘干每小时则消耗3.5千瓦，这将导致2千克的二氧化碳排放。如果烘干以及低温清洗时把洗衣机装满，这样就可以减少洗衣机所消耗的能量，那么我们便能节省更多的能源，环保专家还建议尽量让洗衣机满载工作。
5大坏习惯破坏地球环境
洗衣店
全世界食物的浪费程度令人震惊。在英国，每年约670万吨食物被丢进垃圾桶。这些食物在垃圾堆里不断分解，散发出大量的温室气体(甲烷)。
　　食物浪费对整个食品供应链造成了重大影响，并且增加了储存、运输和包装的成本。其中最大的影响来自食物的生产过程。我们所购买的每种食物，尤其是肉类和乳制品，在生产过程中都会排放出温室气体。
　
5大坏习惯破坏地球环境
食物浪费
Dictation
大气层
温度；气温 大陆
消费者
猜测
环境保护的；赞成环境
无生命的；无生物生长的
燃料
煤
结果
atmosphere
temperature
consumer
guess
green
lifeless
fuel
coal
result
Part V Review
（使）增长；增多；增加
海平面
摧毁；毁灭
自然界；大自然
表面；表层
土壤
洪水；水灾
习惯
正确的；恰当的
无害的
回收利用
目的；用途
increase
sea level
destroy
nature
surface
soil
flood
habit
proper
friendly
recycle
purpose
一、将下列句子改为同义句。
1. As a result of his hard work, he achieved great
success.
_______ _____ his hard work, he achieved
great success.
2. We should do things that are helpful to the
environment.
We should do things that ____ ______ ____
the environment.
3. The government has done something to move
the factory away.
The government ___ ____ _____ __ _____ the
factory away.
Because of
are friendly to
has taken action to move
二、根据汉语意思完成句子。
1. 关好门窗，不要让寒气进来。
Close the door and the windows. Don’t _____
the cold _____.
2. 贫穷成为了他努力学习的原因。
Poverty _____ him _____ _____ hard.
3. 我的观点与你的一样。
My opinion is _____ _____ _____ yours.
let
in
causes to study
the same as
4. 吃得太多会贮存很多的能量。
Eating too much will _____ _____ lots of energy.
5. 父母的言行对孩子有很大的影响。
Parents’ words and behaviour _____ _____ big
_________ to their children.
6. 如果我们不立马采取措施，我们的地球将处于危
险当中。
If we don’t _____ _______ right now, our Earth
will be ______ _______.
make a
difference
keep in
take action
in danger
三、单词拼写：
1. The world population will continue to i_______
in the next few years.
2. If we don't protect the Earth, it will be l_______
as the Moon.
3. Cutting down trees will d_______ the surface of
the soil.
4. We can r________as many things as we can to
protect the Earth.
ncrease
ifeless
estroy
ecycle
5. We still can't find out a s______ to the problem.
6. Smoking is a bad h_______.
7. We should make a p_____ decision before doing
something important.
roper
abit
olution
Thank you!

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