Words review

consume

renewable

greenhouse

Fahrenheit

vt. 消费 ; 消耗 ; 耗尽 ;

吃完adj. 能再生的 ; 可更新的n. 温室 ; 花房adj. 华氏的n. 华氏温度计

Unit 4 Global Warming

What causes the global warming?

Human activity or a random but

natural phenomenon?

A greenhouse

is made of

______ and is

used for growing

_______,

especially during

_____ weather.

What is a greenhouse made of and used for?

glass

plants

cold

Unit 4 Global Warming

Reading:The earth is becoming warmer---

but does it matter?

3.What are the two graphs about?Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to 2000. Graph 2 shows the

carbon dioxide content in the atmosphere from 1957 to 2000.

Graph 1:

Graph 2:

Main ideas of each partMain ideas of each partPart1 Part1

(1)(1)

The background of this article.

Part2Part2(2-5)(2-5)

Explanation about how global warming comes about.

Part3Part3(6)(6)

Part4Part4(7)(7)

Two choices of dealing with this problem.

Introduce a debate over the issue of global warming

Explanation about how global warming comes about.

Two different attitudes among scientists towards global warming.

Para. 2,3,4 & 5

①What has caused global warming?

Detailed Reading

There is no doubt that the earth is becoming warmer and that it is human

activity that has caused this global warming rather than a random but natural

phenomenon.

Human activity:

____________

the ________ of carbon dioxide

more ____ will be ______in the

atmosphere

the increase in the earth’s

temperature

the burning of fossil fuels

result in

How has this come about?

increase

heat energytrapped

Para. 3, 4 &5

coal, natural gas &oil

evidence from Charles Keeling

the greenhouse effect

②

Para. 6 Janice Foster& supporters

George Hambley& supporters

AttitudeTemperature increase would be a ___________.

We shouldn’t ________.

Prediction

It could be very _______.

Any warming will be _____ with _____ bad environmental consequences.

Possible consequences

1.2.

3.4.

More carbon dioxide is _________,because________________________________________________________________________.

sea level risesevere storms, floods, droughts, famines

the spread of diseasesdisappearance of species

positive

mildfew

worry

serious

plants grow quicker crops produce more

a greater range of animals human life easier and better

Catastrophe

A : We shall do something about global warming.

B: We shall do nothing about global warming.

Debate

Agreement & Disagreement• Exactly.• All right.• That’s right.• That’s a good idea.• I think so.• I couldn’t agree

more.• That’s exactly my

opinion.

• I don’t think so.

• I’m afraid not.

• I’m afraid I disagree with you.

• I’m afraid I have a different opinion..

• I think you are absolutely wrong.

Homework: Write a speech to call on people to care our earth