高中英语新课标(人教版)选修六 优秀教案 {Unit4 Global warming Period 2

Period 2Language Study

整体设计

教学内容分析

The emphasis of this period will be placed on the important new words，phrases and sentence patterns in Warming Up，Pre－reading，Reading，Comprehending and Discovering useful words and expressions in Learning about Language.There are altogether 53 new words and phrases in these five parts.20 of them are marked with triangles，which shows that the students needn't learn them by heart.It is enough to recognize them when meeting them while reading the passage.The other 33 should all be remembered，among which the following words and expressions are even more important：tend，range，subscribe to，go up，widespread，state，glance，steady，tendency，keep on，on the whole，quantity of，be opposed to，come about，result in，even if.They are all very useful and important.So are the sentence patterns “...it is a rapid increase when compared to other natural changes.” and “There is no doubt that the earth is becoming warmer...” We ought to pay more attention to them.

三维目标设计

Knowledge and skills

1．To get the students to learn to use the following important new words and phrases freely：tend，range，subscribe to，go up，widespread，state，glance，steady，tendency，keep on，on the whole，quantity of，oppose，come about，result in，even if.

2．To get the students to understand and use the following important and useful sentence patterns：

(1)．..it is a rapid increase when compared to other natural changes.

(2)There is no doubt that the earth is becoming warmer...

Process and methods

1．To help the students to understand the meanings of the above useful new words and expressions in the context，and then give some explanations about them，and at last offer some exercises to make students master their usages.

2．To ask the students to make up their own sentences by imitating the above sentence patterns.

3．At the end of the class，make students do more exercises for consolidation.In doing so，they can learn，grasp and use these important language points well.

Emotion，attitude and value

1．To stimulate students' interest in learning English.

2．To develop students' sense of cooperation and teamwork.

教学重、难点

1．Important new words and expressions：quantity of，oppose，come about，result in，even if.

2．Important and useful sentence patterns：

(1)．..it is a rapid increase when_compared_to other natural changes.

(2)There_is_no_doubt_that the earth is becoming warmer...

3．Some difficult and long sentences in the text.

教学过程

Step 1Revision

1．Check the homework exercises.

2．Ask some students to talk about global warming.

Step 2Reading and finding

Get students to read through Warming Up，Pre－reading，Reading，Comprehending and Discovering useful words and expressions in Learning about Language to underline all the new words and useful expressions or collocations in these parts.Read them aloud and copy them down in the exercise book.

Step 3Practice for useful words and expressions

1．Turn to Page 28.Go through the exercises in Discovering useful words and expressions with students and make sure they know what to do.

2．Give them several minutes to finish the exercises.They first do them individually，and then discuss and check them with their partners.

3．Check the answers with the whole class and explain the problems they meet where necessary.

Step 4Vocabulary study

Ⅰ.简单知识扫描

1．tend(P26)

【原句再现】

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

这意味着更多的热量被困在大气层中，从而引起全球温度上升。

【观察探究】

(1)We sometimes tend to think that the ocean bottom is made up of smooth plains.

我们往往误以为海底由平坦的平原构成。

(2)People under stress tend to express their full range of potential.

处于压力下的人容易发挥自己全部的潜力。

(3)Doctors and nurses tended(to)the injured.医生和护士护理受伤的人。

【归纳总结】

tend vi.& vt.意思是“往往会，趋于，倾向；照料，护理”。作“照料，护理”讲时，常与介词to搭配。

【即景活用】

(1)救护车上的救护人员在照料受伤的工人。

Ambulance crews ______ the injured workers.

(2)男孩往往比女孩个子高。

Boys ______ taller than girls.

Suggested answers：(1)were tending(to)(2)tend to be

2．range(P27)

【原句再现】

...it will encourage a greater range of animals—all of which will make life for human beings better.

这将促进动物的生长——所有这一切都会使人类的生活变得更好。

【观察探究】

(1)Maybe the question is beyond the range of human understanding.

或许这个问题超越了人类理解的范围。

(2)You can see a range of mountains standing on the top of the tower.

站在塔顶你可以看到一系列山脉。

(3)The temperature ranges between ten and thirty degrees.

气温在十至三十度之间。

(4)I ranged the books on the shelf by/according to size.

我把书依大小顺序排在书架上。

【归纳总结】

range n. 意思是“范围；射程；山脉；行列”；v. 意思是“变化；排列；归类于”，常用于range from...to...结构，意为“从……到……范围内变化”。

【即景活用】

有年龄从七岁到十四岁的两百个男孩。

There are two hundred boys ______________.

Suggested answer：ranging from seven to fourteen in age

3．subscribe to(P26)

【原句再现】

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.

所有科学家都赞同这样的观点：人们为了生产能量而燃烧化石燃料(如煤、天然气、石油等)，从而引起了地球温度的升高。

【观察探究】

(1)The children each subscribed 5 pence to buy a present for Nick in hospital.

孩子们每人出五便士为住院的尼克买礼品。

(2)All the people present subscribe to the opinion put forward by the chairman.

参加会议的人全部同意主席提出的意见。

(3)I have subscribed to that magazine for years.

我订阅那本杂志已好几年了。

【归纳总结】

subscribe to的意思有“捐款；捐助；同意，赞同；订购(报纸、杂志等)”等。

【即景活用】

The government called on all the citizens to ______ a relief fund.

A．subscribe to B．agree to C．amount to D．shift to

Suggested answers：A

4．go up(P26)

【原句再现】

It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go_up.

这意味着更多的热量被困在大气层中，从而引起全球温度上升。

【观察探究】

(1)The elevator went up to the fourth floor.电梯升到了四楼。

(2)As you go up a mountain，you have to overcome the earth's gravity which pulls you down.

上山时你必须克服把你往下拉的地球引力。

(3)Prices of fruit and vegetables have gone up.

水果和蔬菜的价格上涨了。

【归纳总结】

动词短语go up的意思有“升；攀登；向上去，沿(街)而去；涨价”等。类似意义的词还有rise，increase等。其反义词是：go down，fall down，decrease。

【即景活用】

(1)物价又上涨了。Prices ______ again.

(2)到处都盖起新的大楼。New buildings ______ everywhere.

Suggested answers：(1)have gone up(2)are going up

5．keep on(P27)

【原句再现】

Even if we start reducing the amount of carbon dioxide and other greenhouse gases，the climate is going to keep_on warming for decades or centuries.

尽管我们已经开始减少二氧化碳和其他温室气体的排放量，但是在未来的几十年或几个世纪里气候将会持续变暖。

【观察探究】

(1)The airplane kept on flying at a high altitude.这架飞机持续在高空飞行。

(2)He kept on smoking after the doctor told him to stop.

医生劝告他戒烟，可他仍继续抽。

(3)He is keeping on the house in his hometown.他把家乡的那所房屋保留着。

(4)Keep straight on and you'll come to the market.一直往前走就到市场。

(5)I have failed several times，but I still keep on.

我已经失败了好几次，但我仍然坚持下去。

【归纳总结】

keep on意为“继续(做某事)；不顾困难、反对或警告而坚持(做某事)；继续前进，继续工作”等。

【即景活用】

Even if I fail again，I will ______ working hard until I succeed.

A．give up B．turn to

C．keep on D．think of

Suggested answer：C

6．on the whole(P28)

【原句再现】

On_the_whole the warming of the earth is a phenomenon that causes great concern.

大体上，地球变暖是一种引起巨大关注的现象。

【观察探究】

The weather this month has been good on the whole.

这个月的天气基本上是好的。

Living in town is pleasant but，on the whole，I like the country better.

住在城里是愉快的，但是，总的来看，我更喜欢农村。

【归纳总结】

on the whole意为“总的看来；大体上；基本上”，相当于in general，mostly，可位于句首、句中或句尾。

【即景活用】

翻译句子

总的看来，我认为他那样做是对的。

Suggested answer：On the whole，I think he was quite right to act as he did.

Ⅱ.重点知识探究

1．oppose(P27)

【原句再现】

On the other hand，there are those，like George Hambley，who are opposed to this view，believe that we should not worry about high levels of carbon dioxide in the air.

另一方面，像乔治·汉布利那些人，他们反对这种观点，认为我们不应该为空气中二氧化碳含量高担心。

【观察探究】

Many members of the council opposed the building of the luxury houses in the centre of the city.

许多市议会议员反对在市中心建造豪华型住宅。

Many residents are opposed to the plan of building the motorway.

许多居民反对修建那条高速公路的计划。

【归纳总结】

oppose vt.& vi.意为“反对；使对立；使对抗；抗争”，后面可直接跟名词作宾语，也可用于be opposed to(doing)sth.结构。

【词汇辨析】

oppose，object和resist

三者都含有“反对”的意思，但是用法有区别。

oppose为常用词，指“对某人、某事采取积极行动来反对”，着重动作，尤指“反对一种观念、思想、计划等”。如：

The father opposed to his son's marriage.父亲反对儿子的婚事。

object 常指“用言论或论据等表示反对”，着重“个人嫌厌”和“(由于与个人有关因此)提出反对意见”。如：

I objected to his plan.我反对他的计划。

resist 指“积极地反抗、对抗；用武力阻止……的前进”，如：

The villagers were united to resist the enemy.

村民们团结起来抵抗敌人。

【即景活用】

我们坚决反对在国与国之间实行强权政治。

We ______ firmly ______ the practice of power politics between nations.

Suggested answers：are；opposed to

2．come about(P26)

【原句再现】

So how has this come_about and does it matter？这种情况是怎么发生的，有什么影响？

【观察探究】

With the use of electricity，great changes have come about.

随着电的使用，种种大变化发生了。

The accident comes about in this way.这事故就是这样发生的。

Many a quarrel has come about through a misunderstanding.

许多争执都是由于误会产生的。

【归纳总结】

come about意为“发生，造成”，有时用it作主语，后面跟that引导的从句。

【词汇辨析】

come about与happen，occur，take place的异同。

come about与happen，occur，take place同义。take place常指经过安排的。happen指“偶然发生”，等于occur。happen to＋v.意为“偶然/碰巧做出”。

It happens/happened that－clause...碰巧……

occur/happen＋to(prep.)．..发生在……

occur＋to(prep.)．..想起……

It occur(－s/－ed)(to sb.)＋to do sth./that－clause想起，想到

【即景活用】

同义句转换

She happened to be out when he called.

A：It ______ that she ______ ______ ______ ______when he called.

B：She ______not to be ______ when he called.

C：It ______ ______ she was not at home when he called.

Suggested answers：A：happened；was not at home B：happened；home C：came about 3．result in(P26)

【原句再现】

They also agree that it is the burning of more and more fossil fuels that has resulted_in this increase in carbon dioxide.

他们还一致认为，正是因为越来越多的化石燃料的燃烧才导致了二氧化碳的增长。

【观察探究】

These measures resulted in a great victory.

由于采取了这些措施，打了一个大胜仗。

The plot resulted in failure.阴谋以失败告终。

【归纳总结】

result in的意思是“产生，导致”，与cause或lead to同义，其主语是起因；in的宾语是结果。result from的意思是“由……引起，产生”，与lie in，as a result of和because of 同义，其主语是结果，from的宾语是起因。

【即景活用】

同义句转换

(1)His failure resulted from not working hard enough.

Not working hard enough______ ______his failure.

(2)His sickness was caused by eating too much.

A．His sickness ______ ______eating too much.

B．He was ill ______he ate too much.

C．______ ______ ______ ______ eating too much，he was ill.

Suggested answers：(1)resulted in(2)resulted from；because；As a result of

4．quantities of(P26)

【原句再现】

The problem begins when we add huge quantities_of extra carbon dioxide into the atmosphere.

当我们把大量额外的二氧化碳排入大气层的时候，问题就出现了。

【观察探究】

(1)Quantities of food(nuts)were on the table.桌子上有许多食品(坚果)。

(2)Great quantities of sand were washed down the hillside by the rain.

雨水把大量的泥沙冲下山坡。

(3)He collected quantities(a quantity)of old pictures.

他收集了大量的旧画。

(4)There is only a small quantity of wine left.只剩下很少一点酒了。

【归纳总结】

quantities of＝a quantity of，意为“大量的”，既可以修饰可数名词，也可以修饰不可数名词。quantities of无论修饰可数还是不可数名词，后面的谓语动词都用复数。

另外，quantity前面还可以加修饰成分，构成的短语有a certain quantity of (一定数量的)，a large(great，good)quantity of(大量的)，a small quantity of(少量的……)，large(great，good)quantities of (大量的)，small quantities of(少量的……)。

【知识拓展】

(1)quantity 量，数量。如：

Without quantity there can be no quality.没有数量就没有质量。

The government has been buying silver in great quantities.

政府一直在大量购进白银。

(in great/small quantities意为“大/少量”，用作状语。)

(2)表示“大量的”时，可用以下形式：

①修饰可数名词

many，a great/large number of，great/large numbers of，a good/great many (后面没有of)，many a(后接单数名词，其谓语动词也用单数形式)

②修饰不可数名词

much，a great/large amount of，great/large amounts of，a great/good deal of

③既可以修饰可数名词，也可以修饰不可数名词

a lot of＝lots of，a quantity of＝quantities of，a mass of＝masses of，plenty of (前面没有a)

▲这些短语均常被形容词修饰，如：a large number of，a small amount of，a great quantity of。

▲quantities of/amounts of＋不可数名词＋复数动词；a lot of/lots of/plenty of＋不可数名词＋单数动词。

▲in amount/amounts/quantity/quantities/number意为“在数量上，大量地”。

【即景活用】

(1)We aim at quality rather than ______.

A．number B．amount

C．figure D．quantity

(2)With more forests being destroyed，huge quantities of good earth ______ each year.

A．is washing away B．is being washed away

C．are washing away D．are being washed away

Suggested answers：(1)D(2)D

5．even if(P27)

【原句再现】

Even_if we start reducing the amount of carbon dioxide and other greenhouse gases，the climate is going to keep on warming for decades or centuries.

尽管我们已经开始减少二氧化碳和其他温室气体的排放量，但是在未来的几十年或几个

世纪里气候将会持续变暖。

【观察探究】

Even if it rained heavily，we still marched on.即使大雨倾盆，我们还是继续前进。

Even if you are a good high－jumper，you jump no more than three meters.

即使是个优秀的跳高运动员，你也跳不过三米。

We shall go，even if it rains.就是下雨，我们也要去。

【归纳总结】

even if有“虽然、即使、尽管”的意思，引导让步状语从句，可以与even though互换，语气比although和though强，可以放在主句前面也可以放在主句后面。

【知识拓展】

though，although引导让步从句的用法：

though，although引导让步从句时，后面的从句不能有but，但是可以用yet。如：

Although it's raining，they are still working in the field.

虽然在下雨，但他们仍在地里干活。

He is very old，but he still works very hard.

虽然很老了，但他仍然努力地工作。

Though the sore be healed，yet a scar may remain.

伤口虽愈合，但伤疤留下了。(谚语)

【即景活用】

(1)We'll make a trip ______ the weather is bad.

A．as for B．even if

C．because of D．as long as

(2)______she is young，she knows quite a lot.

A．When B．However

C．Although D．Unless

Suggested answers：(1)B(2)C

Ⅲ.词汇综合运用

1．用括号中所给的单词或短语翻译下列句子。

(1)即使一个工人持续工作三十余年，他依然买不起房。(even if)

(2)总起来说，中国的房价太高。而且房价还在持续增长。(on the whole；tend；keep on)

(3)他们坚决要求把房价控制在一定的范围内。(range)

(4)尽管政府已经采取了一些措施，但是房价依然在上涨，这导致了许多问题。(although；go up；result in)

(5)许多人想知道这是如何造成的。(come about)

(6)他们反对政府采取的一些措施。(oppose)

Suggested answers：

(1)Even if a worker works continually for more than thirty years，he still can't afford a house.

(2)On the whole，the price of houses in China is too high.And it tends to keep on rising.

(3)They insist that the price of houses should be controlled within a range.

(4)Although the government has taken some measures，the price of houses is still going up，which has resulted in many problems.

(5)Many people want to know how it comes about.

(6)They oppose some measurements taken by the government.

2．连句成篇(按照一定的逻辑顺序适当调整句子的顺序，把上面的句子连成一篇小短文，

必要时增加适当的连词。)

________________________________________________________________________ ________________________________________________________________________ Suggested answers：

On the whole，the price of houses in China is too high.And it tends to keep on rising.Although the government has taken some measures，the price of houses is still going up，which has resulted in many problems.Even if a worker works continually for more than thirty years，he still can't afford a house.Many people want to know how it comes about.They oppose some measurements taken by the government and insist that the price of houses should be controlled within a range.

Step 5Sentence focus

1．...but it is a rapid increase when_compared_to other natural changes.(P26)

……但是，同自然界的其他变化相比，这种升高是迅速的。

这是一个省略句，补全之后是．..but it is a rapid increase when it is compared to other natural changes。

一般说来，省略现象多出现在下列五种状语从句中：

(1)由when，while，as，before，after，till，until，once等引导的时间状语从句；

(2)由whether，if，unless 等引导的条件状语从句；

(3)由though，although，even if，whatever等引导的让步状语从句；

(4)由as，than 等引导的比较状语从句；

(5)由as，as if，as though 等引导的方式状语从句。

上述状语从句在省略时，并非任何成分都可以省略，而是遵循以下原则：

(1)当状语从句的主语与主句的主语一致时，可以省略状语从句的主语和系动词be，这时从句中可出现如下结构：

①连词(as，as if，once)＋名词。如：

Once(he was)a worker，Pang Long now becomes a famous singer.

庞龙曾经是个工人，现在成了一位著名的歌手。

②连词(though，whether，when)＋形容词。如：

Work hard when(you are)young，or you'll regret.

趁年轻要努力学习，要不然你会后悔的。

③连词(whether，as if，while)＋介词短语。如：

He looked everywhere as if(he was)in search of something.

他到处看似乎在找什么东西。

④连词(when，while，though)＋现在分词。如：

While(he was)holding talks with President Hu Jintao，US President George W．Bush thanked China for its important role in the Six－Party Talks.

在与胡锦涛主席会谈时，美国总统布什感谢中国在六方会谈中起的重要作用。

⑤连词(when，if，even if，unless，once，until，than，as)＋过去分词。如：

The exhibition is more interesting than(it was)expected.

这次展览比被预料的有趣得多。

⑥连词(as if，as though)＋不定式。如：

Olympic gold medalist hurdler Liu Xiang opened his lips as if(he were)to speak.

奥林匹克金牌获得者跨栏运动员刘翔张开嘴，好像要说什么。

(2)当从句的主语是it，谓语动词中又含有系动词be 时，可以把it和系动词be一起省

略。此时构成连词(if，unless，when，whenever)＋形容词的结构。如：

Unless(it is)necessary，you'd better not refer to the dictionary.

如果没有必要，你最好不要查字典。

2．There_is_no_doubt_that the earth is becoming warmer...(P26)

毫无疑问地球正在变暖……

在There is no doubt后常可跟that引导的同位语从句(在肯定句中，doubt后面有时可跟whether引导的从句)。

There is no doubt that you will succeed if you try your best.

毫无疑问如果你尽最大努力你一定会成功。

There is no doubt that he will come on time.他一定会准时来。

类似常用结构：

There is no knowing/telling...没法知道/说……

There is no need...没有必要……

There is no question...……是没有问题的。

There is no reason...没有理由……

There is no possibility that...……是没有可能的。

It is no/small wonder that...(No wonder that)．..难怪……

It is a wonder that...……真奇怪/真是令人惊奇。

Step 6Homework

1．Finish off the Workbook exercises.Do Exercise 1 in Using Words and Expressions in your exercise book.

2．Learn the useful new words and expressions by heart.

Step 7Reflection after teaching

________________________________________________________________________ ________________________________________________________________________

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高中英语学习材料 madeofjingetieji Module 4 Music 单元练测卷 Ⅰ.单项选择（共15小题；每小题1分，满分15分）1. People built a monument _______ those who died for the country. A. in praise of B. in need of C. in the hope of D. in honour of 2. Don’t forget to insure against theft _______ you have things stolen. A. in case of B. in case C. in the case D. in any case 3. If he can _______ his talent with hard work, he should be very successful. A. combine B. connect C. link D. join 4. It was such a _________to hear that her son was found safe and sound in the forest. A. ease B. assistance C. comfort D. relief 5. I’m going to town to see my teacher ______ buying something. A. exceptfor B. in addition to C. but D. except 6. We do not have enough money. ________ we cannot afford to buy the new car. A. Therefore B. But C. Besides D. However 7. Every man in this country has the right to live where he wants to __________ the color of his skin. A. with the exception of B. in the light of C. according to D. regardless of 8. He was ________ a gold cup for his excellent performance as a reward. A. given B. won C. gained D. presented 9. —Did you notice Jack was not at work today? —No. I _______ with the manager. A. talk B. had been talking C. am talking D. have been talking 10. By the time he finishes the part-time job, he _____ much work experience. A．will gain B．will have gained C．has gained D．had gained 11. Driving a car needs a lot of practice and this is true _________ studying English. A. of B. to C. in D. at 12. It was some time ________ we realized the truth. A. when B. until C. since D. before 13. I often played table tennis for half an hour after class, which made me __________ . A. relax B. relaxing C. relaxation D. relaxed 14. In schools, is it required that no parent _______ to classrooms during class time? A．have access B．has connection C．have contacts D．has access 15. Mr Smith loves music very much but doesn’t like Jazz and _________ . A. neither is his wife B. so is his wife C. so his wife is D. it is the same with his wife Ⅱ.完形填空（共20小题；每小题1分，满分20分）Robert performs his 24-foot boat past willow(柳 建议用时满分实际用时得分错题档案90分钟100分

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U4(选修六) on/ upon+ n 依靠,依赖, 确(坚)信 You can't depend on your parents forever. depend on/upon+sb.+to do 指望某人做…… You can't depend on him to come on time. depend on/upon +it +that…. 指望….. You may depend on it that he will come. depend on/upon +wh-从句 Whether you can pass the exam depends on how hard you work. That (all) depends./ it all depends. (口语)视情况而定， I may help you. But that/ it depends. 2.light 1)n. 光,线,灯 2)v.照亮,点燃-----lit(lighted）-----lit(lighted） He lit a match. 他划着了一根火柴。 A smile of triumph lit up her face. 她的脸上闪耀着胜利的微笑。 The match lights easily. 这火柴容易划着 3)adj . The suitcase is very light.（轻的） There was a light rain falling. （蒙蒙细雨）·heavy rain/rain cats and dogs倾盆大雨He is a light sleeper. 他睡不沉。（易醒的） 3. heat v. / heat up 是某物变热或变暖 heated adj. 热的激烈的 heated debate, heated discussion heatedly adv.愤怒地激昂地 heater加热器发热器 consumer (n.). 1 消耗,花费;耗尽 She consumed most of her time in reading.

高二人教新课标选修6 unit 4 课文翻译

Reading 1 THE EARTH IS BECOMING WARMER —BUT DOES IT MATTER?www.2abc8.co During the 20th century the temperature of the earth rose about one degree Fahrenheit. That probably does not seem much to you or me, but it is a rapid increase when compared to other natural changes. So how has this come about and does it matter? Earth Care's Sophie Armstrong explores these questions. There is no doubt that the earth is becoming warmer (see Graph 1) and that it is human activity that has caused this global warming rather than a random but natural phenomenon. 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. Some byproducts of this process are called "greenhouse" gases, the most important one of which is carbon dioxide. Dr Janice Foster explains: "There is a natural phenomenon that scientists call the 'greenhouse effect'. This is when small amounts of gases in the atmosphere, like carbon dioxide, methane and water vapour, trap heat from the sun and therefore warm the earth. Without the "greenhouse effect', the earth would be about thirty-three degrees Celsius cooler than it is. So, we need those gases. The problem begins when we add huge quantities of extra carbon dioxide into the atmosphere. It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up."www.2abc8.co We know that the levels of carbon dioxide have increased greatly over the last 100 to 150 years. It was a scientist called Charles Keeling, who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. He found that between these years the carbon dioxide in the atmosphere went up from around 315 parts to around 370 parts per million (see Graph 2). All scientists accept this data. They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. So how high will the temperature increase go? Dr Janice Foster says that over the next 100 years the amount of warming could be as low as 1 to 1,5 degrees Celsius, but it could be as high as 5 degrees. However, the attitude of scientists towards this rise is completely different. On the one hand, Dr Foster thinks that the trend which increases the temperature by 5 degrees would be a catastrophe. She says, "We can't predict the climate well enough to know what to expect, but it could be very serious." Others who agree with her think there may be a rise of several metres in the sea level, or predict severe storms, floods, droughts, famines, the spread of diseases and the disappearance of species. On the other hand, there are those, like George Hambley, who are opposed to this view, believe that we should not worry about high levels of carbon dioxide in the air. They predict that any warming will be mild with few bad environmental consequences. In fact, Hambley states, "More carbon dioxide is actually a positive thing. It will make plants grow quicker; crops will produce more; it will encourage a greater range of animals — all of which will