consume: vt use time, energy,goods…

eg: Each year Americans consume a high percentage of the world's energy

consumer

 

The earth is becoming warmer—But does it matter?

Try to find the answers to the following questions.

1. What is it that has caused the increase in Co2 ?

2. Which gas is a representive one of greenhouse gases?

3. What is the “ greenhouse effect”?

4. Without the greenhouse gases, what would happen to the earth?

 

True or false

1. Compared to other natural changes, the temperature of the earth has a more obvious rise.

2. The text tells that global warming is completely harmful to us.

3.We don’t need greenhouse gases at all.

4. All the scientists share the same attitude to global warming.

课文知识点

1. So how has this come about and does it matter?

1). come about:

  eg: How did it come about that he knew where we were?

2). matter: vi to be important, especially to be important to you, or to have an effect on what happens

有关系, 要紧

eg: It doesn't matter to me what you do

   It doesn’t matter who you are.

   It doesn’t matter whether he will come or not tomorrow.

It doesn't etc matter who/why/what etc

Will it matter if I'm a little late?

[同步练习]

 

It is the ability to do the job___matters not where you come from or what you are.

A one   B that   C what   D it

 

 

Not where you come from or what you are but the ability to do the job matters

 

A one   B that   C what   D it

 

2. 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.

==There is no doubt that human activity has caused this global warming rather than a random but natural phenomenon.

 

 

 

random: adj/n

eg: Twenty students were chosen at random to take part in the experiment.

3.All scientists subscribe to the view that the increase in the earth’s temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy.

 subscribe: 订阅, 支持,

eg: subscribe to a view/theroy/belief …

    I subscribed to several magazines

[知识拓展]

同位语从句

 This is Tom, my best friend.

    Beijing, the capital of China, has a long history.

 

 

 

 

当一个句子来充当同位语时，就叫同位语从句。同位语从句多在这些名词后出现，如idea, fact, news, hope, doubt, rumour, belief, word(=news)

suggestion，thought，view 从句引导词多是that。少数情况用whether, when where, how等。同位语从句的引导词根据意思选择。

 

Eg: There is no doubt that we will win. ( 否)

  There is some doubt whether we will succeed. （肯）

The news that the rocket was successfully launched was exciting.

I have no idea who broke the window.

同位语从句Vs 定语从句 ？

 

 

 

I have heard the news that he visited our factory .   [同位语从句 ]

I have heard the news that he told you the other day .  【定语从句】

 

1). 同位语从句前的名词多是表示抽象意义的名词，同位语从句多在这些名词后出现，如idea, fact, news, hope, doubt, rumour, belief, word(=news)  suggestion，thought， 从句引导词多是that。少数情况用whether, when where, how等。同位语从句的引导词根据意思选择。而定语从句的先行词理论上可以 是任何名词。

2). 同位语从句前的名词在同位语从句中不担当成分；而定语从句的先行词在定从中 必然充当成分

 

 

4. Some byproducts of this process are called “greenhouse” gases, the most important one of which is carbon dioxide.

[同步练习]

5. Without the greenhouse effect, the earth would be about thirty—three degrees Celsius coller than it is.

== If there were no greenhouse effect, the earth would be about thirty—three degrees Celsius coller than it is.

6. The problem begins when we add huge quantities of extra carbon dioxide

into the atomsphere.

 a large quantity of+ [U]/[pl]

 quantities of + [U]/[pl]

[同步练习]

1). As a result of destroying the forests, a large ____ of desert ____ covered the land. (2001 上海)

A. number; has    B. quantity; has

C. number; have   D. quantity; have

 

2). Large quanties of steel ____ in the work.

A. were wasted    B. was wasted

C. are wasted     D. have been wasted

7. It means that more heat energy tends to be trapped in the atomsphere causing the global temperature to go up.

tend to do …: if sth tends to happen, it happens often and is likely to happen again:

eg: Women tend to live longer than men.

==Women are likely to live longer than men.

Bill tends to talk too much when he's nervous.

l   intend to do …:

eg: I intend to spend the night there.

I wasn't sure why he'd done it, but I intended to find out.

 

 

8. They agreed that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.

9. The attidude of scientists towards/to this rise are completely different.

10. trend:

11. be opposed to sth