Unit 4 Global Warming

Save the earth!

Work in groups ---list things as required :

1. Things that use energy around us or at any other places,( ie. light)

2.Sources of energy (ie. coal)

Warming up – I ( ３ m )

Things that use energy around us or at any other places:

In a house

Things that use energy Sources of energy

lights

television

cassette player

computer

fridge

stove

washing machine

hairdryer video recorder

coal oil

natural gas

wind(power)

sun(solar energy)

water(hydro-electric power)

the sea ( tidal energy)

uranium(nuclear energy)

plant waster(biomass energy)

Windmills, renewable.

What? Renewable?

Warming up – II ( 5 m )

What? What kind? Renewable?

A coal power station , non-renewable.

What? What kind? Renewable?

An oil refinery( 精炼厂 ), non-renewable.

What? What kind? Renewable?

A nuclear power plant, non-renewable.

What? What kind? Renewable?

A hydro-electric dam, renewable.

Geothermal ( 地热的 ) Energy Plant

• Coal• Oil• Natural gas• Uranium

• Wind (wind power)• Sun (solar energy)• Water (hydro-electric

power)• Plant waste

(biomass energy)• Hot springs or

geysers (geothermal energy)

• The sea (tidal energy)

Fossil fuels

Non-renewable Renewable

What are fossil fuels?

• Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed.

What about the weather?

9 / 14℃ ℃

We need…

Pre-reading ( 3m )

The sun.

How about the plants?

If lack of solar energy, the plants…

Greenhouse

Greenhouse gases!

• What are greenhouse gases?

• What’s greenhouse effect?

Let’s see the following picture about it.

Global Warming

Reading

Read the passage again to find out the answers to the questions in Ex.1

Reading I –scanning (5m)

1.Who wrote the magazine article? What is the name of the magazine?

2.What are the names of the three scientists mentioned in the article?

→ Sophie Armstrong, Earth Care.

→ Dr Janice Foster, Charles Keeling, George Hambley.

→ There are some very different attitudes among scientists towards this issue. Some think the effects will be terrible, while some others believe that we should not worry about it.

3. What do they think about global warming? Do they agree with one another?

→ The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2000. The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1977.

→ Global warming / the warming of the earth

4. What are the two graphs about?

5. What is the main topic of the article?

Read the passage carefully and judge whether the statements are true or false?

FT

Reading II-skimming (5m)

T FT T

How many parts can the text be divided into?

Tips:

Part 1 (para __)

Part 2 (para ___ to ___)

Part 3 (para ___ to ___)

Part 4 (para ___ to ___)

Reading III-detailed reading (8m)

Choices.

1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr. Janice Foster. B. Charles Keeling.C. George Hambley. D. Sophie Armstrong.

B

〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓

Reading IV (3m)

2. "But there are some very different attitudes among scientists towards this issue.“ "Issue" here means the same as the one in________.A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign.C. The government is expected to issue a statement about the election.D. The magazine has 12 issues each year.

B

〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓

〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓

3. The author probably agrees that ________A. actually global warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming.

D

〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓

〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓 〓〓〓〓〓〓〓〓〓

The different ideas between Dr. Janice Foster & George Hambley

Dr. Janice Foster George Hambley

Carbon dioxide has caused the global temperature to __________. An increase of five degrees would be a ____________ and could be ______________.

More carbon dioxide is a __________ thing,which makes crops __________ and will en- courage ____________________.

go up

catastrophe

Very serious

positive

produce

a greater range of animals

Reading V (4m)

Summary

Skim over the passage, and tell what you have learnt in class.

Try to talk in general terms rather than in details.

eg: I learnt that the earth is becoming warmer.

I learnt that global warming could have terrible effects on the environment.

….

DebateA

B

A : We shall do something about global warming.

B: We shall do nothing about global warming.

Assignment

1.Read the passage again and review the new words and expressions.

2.Prepare the debate in groups.

3.Surf the Internet for more information about global warming.

Unit 4 Global Warming

Save the earth!

强调句型

强调句型，你掌握了吗？

一、 It is/was+ 被强调部分 + that+ 剩余的部分

被强调部分是人 who/whom/ that

+ 剩余的部分 注意 (( 被强调部分是被强调部分是 :: 主语，宾语，表语或状主语，宾语，表语或状

语语 ))1. 强调句的连接词一般只用 that ； 强调人时

，可用 who ( 主语 ) 或 whom ( 宾语 ).2. 强调句的时态一般为“ It was+…+that”3. 强调句的一般疑问句句型： Is / Was +it + 所

强调的部分 +that / who/ whom?4. 强调句的一般疑问句句型：疑问词 + 所强调

的部分 +that / who/ whom?

1. 我是在街上遇见她的父亲的。 ( 强调在街上 )

2. 你是 8 点开始工作的吗？（强调时间）

3. 正是因为她病了，他们才没见她做这项工作。

4. 他为什么不能回答这个问题？

It was in the street that I met her father.

Was it at eight o’clock that you began to work?

Because she was ill, they didn’t ask her to do the job.

→It was because she was ill that they didn’t ask her to do the job.

Why was it that he couldn’t answer the question.

（强调原因）

判断是否是强调句是，可把 It is / was …that 去掉，剩余部分在不增减任何词的情况下还是一个完整的句子，那么这种句子是强调句。

It was in the street that I met her father. →In the street I met her father.

It was because she was ill that they didn’t ask her to do the job.

→Because she was ill, they didn’t ask her to do the job.

二、 not ... until ... 的强调形式 : It is not until + 被强调部分 + that ... “ 直到…才…”，主要用于强调时间状语的强调句型。

I didn't realize she was a famous film star until she took off her dark glasses. → Not until she took off her dark glasses did I realize she was a famous film star.→ It was not until she took off her dark glasses that I realized she was a famous film star.

三、 句子谓语 谓语 的强调手段：do / does / did + 动词原形

e.g 我的确相信他是老实人。

I do believe that he is an honest man.

他们昨天的确去看过你，但没见到你。They did go to see you yesterday, but failed to meet you.

四、 What + 从句 + is / was …

是名词从句结构，常用来强调主语、宾语。

e.g 他最希望的是成为一名飞行员。（强调宾语）What he wishes most is to become a pilot.

所叙述的是现在或者将来发生的事情

What + 从句 is …

所叙述的是过去发生的事情

What + 从句 was …

What interested me most was the beautiful scenery.

给予我们鼓励的是他为我们树立的榜样。（强调主语）

What encouraged us was the example he set for us.

What + 从句 + is / was …使我最感兴趣的是那美丽的风景。 （强调主语）

巩固练习：1.It was ___ he said ____disappointed

me.A. what ; that B. that; thatC. what; what D. that; what2. Is it in the factory _____ this type of

cars are produced?A. which B. where C. that D. / 3. Is it the factory______ this type of ca

rs are produced ?A. which B. where C. that D. /

4. _____ on Monday night that all this happened?

A. Is it B. It is C. Was it D. It was5. It was _____ the old worker came that

we _____ the experiment.A. until; didn’t begin B. not until; beganC. until began D. not until; didn’t begin 6. It is I ____ singing in the garden.A. who are B. who is C. that am D. that is

7. ---Why didn’t you answer when I spoke to you in the street this morning?

---I ___ but you didn’t hear me.A. did answer B. didn’t want to answer C. couldn’t answer D. was too busy8. It is in the west of China _____ there is no

doubt _____it is going to rain tomorrow.A. where; whether B. that; thatC. that; whether D. where; that 9. It was 1969___ the American astronauts

succeeded in landing on the moon.A. that B. when C. on which D. which

10. It was the training _____ he had as a young man ____made him such a famous writer.

A. when; that B. that; when

C. that; who D. that; that

　 1. It was about 600 years ago ______ the first clo

ck with a face and an hour hand was made. (NM

ET 1997)

A. that B. until C. before D. when

　 2. It was only when I reread his poems recently

_____ I began to appreciate their beauty. (NMET

1998)

A. until B. that C. then D. so

A

B

高考链接

3. It is these poisonous products ______ can cause

the symptoms of the flu, such as headache and

aching muscles. (NMET 2003 上海 )

A.who B. that C. how D. what

4. Why! I have nothing to confess. _____ you wan

t me to say? (NMET 2004 上海 ) 　　A. What is it that B. What it is that

C. How is it that D. How it is that

B

A

5. It was ______ back home after the experiment.

(NMET 2004 湖北 )

A. not until midnight did he go

B. until midnight that he didn’t go

C. not until midnight that he went

D. until midnight when he didn’t go

6. It was with great joy ______ he received the ne

ws that his lost daughter had been found. (NMET

2004 福建 )

A. because B. which C. since D. that

C

D

Assignment

Review the grammar and then finish the exercises on P29.

Unit 4 Global Warming

Save the earth!

What can we do about global warming?

SummarySummary

We should do something about global warming. Because it could have many negative effects on the earth. With the temperature increasing, the polar ice caps eventually would melt, causing sea levels to rise by several meters. Coastal and low-lying cities would be submerged. Some scientists predict severe storms, droughts, famines, the spread of diseases and the destructions of species.

WHAT CAN WE DO ABOUT GLOBAL WARMING?

What shall we do in our daily life?

Task 1:

Skim the first letter, and answer the questions below:

1. Who is the writer?

2. What is the purpose of the email? / What are the two concerns of the email?

1. Who is the writer?

2. What is the purpose of the letter? / What are the two concerns of the letter?

A student named Ouyang Guang.

① His opinion that, as an individual, he can have no effect on environmental problems.

② Getting some suggestions for what he can do about global warming ;

Task 2: Read the second email, and answer the question:

Do Earth Care agree with Ouyang Guang’s opinion that individuals can have no effect?

No, Earth Care dose not agree.

Task 3: Now scan the letter and list Earth Care’s suggestions in the chart on P30, and discuss whether you can carry out each suggestion. Give reason for you answers.

Earth Care’s suggestion

Can you carry it?

Reason

Earth Care’s suggestion

Can you carry it?

Reason

If you are not using electrical appliances, turn them off.

Yes Save energy

If you’re cold, put on more clothes instead of turning up the heat.

Yes Save energy

Motor vehicles use a lot of energy, so walk or ride a bike if you can.

Yes Save energy

Recycle cans, bottles, plastics and newspapers and buy things made from recycled materials.

Yes Save energy

Earth Care’s suggestion

Can you carry it?

Reason

Get your parents or friends to buy products that are made to save energy.

Yes Save energy

Plant more treesYes Plants absorb

carbon dioxide from the air

Talk with your family and friends about global warming and tell them what you’ve learned.

YesTogether, individuals can make a difference.

Clean up Your Butts and Bags

Read Tom’s essay about litter. Make a summary for each paragraph, and then fill in the following table.

Reading task on 66

First para. Point of view

Second para.First point of the argument

Evidence

Third para.Second point of the argument

Evidence

Fourth para. Point of view

First para.

Point of view

Second para.

First point of the argument

Evidence

Cigarette buts and plastic bags are a serious environmental problem.

Butts are small but are still bad for the environment.

1.1600 billion cigarettes are smoked each year in China. Many of these become litter.

2.4.5 trillion butts are littered every year in the world.

3.Butts are ugly.

4.Butts contain toxic chemicals. These get into the water supply. These decrease the quality of the water and endanger living things.

5.Butts take up to 5 years to break down, so the toxic chemicals add up to a great amount.

Evidence:

Third para.

Second point of the argument

Evidence

Plastic bags are a danger to the environment.

1.Plastic bags are made from non-renewable resources. If they are not recycled, these resources are lost to us.

2.In china, 2 billion plastic bags are used every day.

3.Plastic bags last from 20 to 1,000 years in the environment.

……

Fourth para.

Point of view

The environment would be less polluted if we cleaned up cigarette butts and plastic bags. The best solution would be not to smoke or use plastic bags at all.

Assignment

In groups of four, make a poster for the school that tells the students various ways they can reduce the amount of carbon dioxide in the air.