北师大版Unit22.Lesson1Global-Warming阅读PPT课件
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北师大版高中英语选修八Unit 22《Lesson 1 Global Warming》课件 Reading 2
Use the expressions in the box in the correct form to complete the sentences.
beyond our control, pump into, as a result of, in large quantities, refer to, speed up
people worldwide, the savings are significant.
Taking public transport like buses can reduce greenhouse gas emissions
And Taking train can also help a reduction of greenhouse gas.
pumped into
1 Water was
the fish pond from the
river. 2 We all need to
speed up
to finish in time!
3 There is nothing more we can do .the situation is now beyond our contr.ol
The Greenhouse Effect
Without this greenhouse heating, the Earth's average temperature would be only about -73 C
(-100 F); even the oceans would be frozen under such conditions,such as the Moon and the Mars.
to believe that
高中英语复习北师大版《Unit 22 Warm-up Lesson 1 Glo》 课件 (共17张PPT)
Writers often refer to a dictionary. 作家时常参考字典 The scientist _________global warming at referred to least 3 times in his speech. 那位科学家在演讲中至少3次提到全球气候变暖。 请不要再提这件事了 Don't refer to this matter again, please.
reference
lead sb. to someplace/sth. 领着某人去某地，使 得某人…… Your explanation has ____ me ____ a clear to _____________ of it. led understanding 你的解释使我清楚地了解了此事。 lead sb. to do sth. 使得某人做某事 lead the way 领路；引路
The plant _______to in the textbook is referred common in the surrounding area. (refer) Although she didn't mention any names, everyone know who she was referring to.___ A. 提到，谈到，涉及 B. 参考，查阅 ________n. 提及；涉及；参考；参考书
狗被困在了笼子里，真可怜！
那时她被困在燃烧着的房子里。 She at that moment.
was trapped in the burning house
a number of “许多的；大量的”后接可数名 复数 形式。 词，在句中作主语时谓语动词用____ the number of “...的数目”，后接可数名词， 单数 形式。 在句中作主语时谓语动词用____ A number of my friends think I should take a holiday. 我的一些朋友认为我应该休假。 The number of wild animals has become less and less in recent years. 最近几年里，野生动物的数量逐渐减少。
北师大高中英语选修八Unit22Lesson1教学课件
高中英语课件
madeofcanruohanxing
英语：Unit22 lesson 1 教学课 件（北师大版选修8）
Lesson 1 Global
Warming
Appreciation of a
film trailer
Words preview
consensus beyond claim relevant ray bounce pin
n. 一致的意见 prep. 超出 vt. 声称 adj. 有关的 n. 光线 vi. 反弹 vt. 固定
Words preview
agriculture coincidence condemn drought federal reservation sacrifice
n. 农业 n. 巧合 vt. 宣判死刑,注定毁灭 n. 旱灾 adj. 联邦的 n. 保留,存疑 vt., vi. 牺牲,献出
_p_r_e_v_io_u__sl_yseen as _b_e_y_o_n_d_o_u__r_c_o_n_t_r_o_l .
beyond 在那边/超出……的范围
This book on literature is beyond our reach. This bicycle is beyond repair.
2. They claim that gases pumped into the Earth’s atmosphere by the factories and vehicles have been speeding up the process of global warming and affecting our climate. What is the function of the underlined part “pumped…vehicles”?
madeofcanruohanxing
英语：Unit22 lesson 1 教学课 件（北师大版选修8）
Lesson 1 Global
Warming
Appreciation of a
film trailer
Words preview
consensus beyond claim relevant ray bounce pin
n. 一致的意见 prep. 超出 vt. 声称 adj. 有关的 n. 光线 vi. 反弹 vt. 固定
Words preview
agriculture coincidence condemn drought federal reservation sacrifice
n. 农业 n. 巧合 vt. 宣判死刑,注定毁灭 n. 旱灾 adj. 联邦的 n. 保留,存疑 vt., vi. 牺牲,献出
_p_r_e_v_io_u__sl_yseen as _b_e_y_o_n_d_o_u__r_c_o_n_t_r_o_l .
beyond 在那边/超出……的范围
This book on literature is beyond our reach. This bicycle is beyond repair.
2. They claim that gases pumped into the Earth’s atmosphere by the factories and vehicles have been speeding up the process of global warming and affecting our climate. What is the function of the underlined part “pumped…vehicles”?
GlobalWarming-Warmingup课件(北师大版选修8Unit22Lesson1)
6 Experts call for immediate international efforts. conservation
T
In pairs, discuss which animals among the top 5 endangered species in China.
tiger cheetahs
3 Because of the greenhouse effect , the Earth is warmed by gases trapped in the atmosphere.
Global warming 4 is an increase over the time of average temperature of the Earth.
panders
lions
elephants
Chiru, Tibetan antelope（藏羚羊）
kekexili
Slow Loris (蜂猴）俗名懒猴
Sika Deer (梅花鹿）
4 .What can you do to help save them ? Write down your suggestions, then present you ideas to the class.
4 Fishing boats do not affect the deaths of penguins. F Overfishing and pollution from oil tankers have killed thousands of penguins.
5 Most penguins species outside of Antarctica are safe from environmental changes. F Not safe but endangered
T
In pairs, discuss which animals among the top 5 endangered species in China.
tiger cheetahs
3 Because of the greenhouse effect , the Earth is warmed by gases trapped in the atmosphere.
Global warming 4 is an increase over the time of average temperature of the Earth.
panders
lions
elephants
Chiru, Tibetan antelope（藏羚羊）
kekexili
Slow Loris (蜂猴）俗名懒猴
Sika Deer (梅花鹿）
4 .What can you do to help save them ? Write down your suggestions, then present you ideas to the class.
4 Fishing boats do not affect the deaths of penguins. F Overfishing and pollution from oil tankers have killed thousands of penguins.
5 Most penguins species outside of Antarctica are safe from environmental changes. F Not safe but endangered
高中英语北师大版U22 warm&lesson1课件
1
Complete the sentences
4. Global warming is an increase over time of the average temperature of the Earth. 5. Overfishing is harmful to the ecology of the sea. 生态 6.Thousands of people in Africa continue to die because of war and poverty . 7.The water level rose so high…that many homes are at risk from flooding .
3.By 1˚ F
4. Yes, they are, because they trap heat from the sun in the earth’s atmosphere. Otherwise the Earth would be cold and unsuitable for life.
Read and answer
(1) previously: in the past
previous adj. She is his daughter from a previous marriage.
我们在上个模块学过虚拟语气． We have learnt Subjunctive Mood in the previous module. (2) beyond 在那边/超出…的范围 This book on literature is beyond our reach. 他的忠诚是毋庸置疑的. His honesty is beyond question.
北师大版Unit2Lesson1Global Warming阅读 PPT
Read the text and answer the questions.
1. What human activities are causing global warming? 2. By how much has the global average temperature
increased in the last 100 years? 3. Are greenhouse gases necessary for life on Earth? 4. How can we help solve the problem of global
There have been several summits of governments to discuss this problem but many countries don’t want to make changes to their factories and industrial works as this would cost them money.
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buy the recycled products
The recycling symbol
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use low-flow shower heads
buy energy-efficient light bulbs
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Post reading: Group work
Voice your opinions:
warming. E. What cause global warming
Scanning:
Scan the text below for these words and work out their meanings.
高中英语 Unit22 lesson1 global warming课件 北师大版选修8
国家保护等级一级
濒危原因栖息地破坏，过度捕猎
物种代码011050008 中文名红斑羚
拉丁学名Naemorhedus cranbrooki 俗名红斑羚，红山羊，赤斑羚
商品名英文名S.China Goral CITES公约附录未列入 IUCN等级未列入 红皮书等级稀有
国家保护等级一级
濒危原因栖息地破坏，作为食物被捕猎，过度捕猎
物种代码010670001 中文名白暨豚
拉丁学名Lipotes vexillifer 俗名白暨豚
商品名英文名Yangtze River Dolphin CITES公约附录附录I IUCN等级濒危 红皮书等级濒危
国家保护等级一级
濒危原因回游被切断，过度捕猎，环境污染
保护措施迁地保护
物种代码011050011 中文名藏羚
拉丁学名Capra ibex 俗名亚洲 羊，红羊，悬羊
商品名英文名Ibex CITES公约附录未列入 IUCN等级未列入 红皮书等级濒危
国家保护等级一级
濒危原因作为食物被捕猎，
栖息地破坏
物种代码010530009 中文名云豹
拉丁学名Neofelis nebulosa 俗名乌云豹，龟纹豹，荷叶豹，艾叶豹，樟豹
Unit 22
地
Environmental Protection
球
Lesson 1
Exercise 1
How much do you know about environental problems?use the key words to complete the sentences:
1.Earthquakes and volcanic eruptions are examples of
濒危原因栖息地破坏，过度捕猎
物种代码011050008 中文名红斑羚
拉丁学名Naemorhedus cranbrooki 俗名红斑羚，红山羊，赤斑羚
商品名英文名S.China Goral CITES公约附录未列入 IUCN等级未列入 红皮书等级稀有
国家保护等级一级
濒危原因栖息地破坏，作为食物被捕猎，过度捕猎
物种代码010670001 中文名白暨豚
拉丁学名Lipotes vexillifer 俗名白暨豚
商品名英文名Yangtze River Dolphin CITES公约附录附录I IUCN等级濒危 红皮书等级濒危
国家保护等级一级
濒危原因回游被切断，过度捕猎，环境污染
保护措施迁地保护
物种代码011050011 中文名藏羚
拉丁学名Capra ibex 俗名亚洲 羊，红羊，悬羊
商品名英文名Ibex CITES公约附录未列入 IUCN等级未列入 红皮书等级濒危
国家保护等级一级
濒危原因作为食物被捕猎，
栖息地破坏
物种代码010530009 中文名云豹
拉丁学名Neofelis nebulosa 俗名乌云豹，龟纹豹，荷叶豹，艾叶豹，樟豹
Unit 22
地
Environmental Protection
球
Lesson 1
Exercise 1
How much do you know about environental problems?use the key words to complete the sentences:
1.Earthquakes and volcanic eruptions are examples of
高中英语Unit 22 Lesson 1 Global Warming (Warm up)课件 北师大版 选修8
4 Fishing boats do not affect the deaths of penguins. F Overfishing and pollution from oil tankers have killed thousands of penguins.
5 Most penguins species outside of Antarctica are safe from environmental changes. F Not safe but endangered 6 Experts call for immediate international conservation efforts. T
Slow Loris (蜂猴）俗名懒猴
Sika Deer (梅花鹿）
4 .What can you do to help save them ? Write down your suggestions, then present you ideas to the class. Everyone shares a responsibility in helping to save Endangered Animals that live on Earth. Here are some ways we can help all wildlife: （1） Support zoos, reserves, and organizations that help animals. Volunteer your money, time and ideas.
（2）Avoid buying any products made from endangered animals.
Do not buy!
北师版U22L1Gllobal Warming公开课课件
CO2 heat trap atmosphere
Careful Reading Para.3&4
Finish the mind map.
Reasons of global warming increased industry Mostly pinned on human activities ____________ agriculture increased _________ forests the cutting down of _________ transport the increase in _________ the burning of fuels ____________________
Careful Reading Para.1 In your opinion, the purpose of para.1 is ________________________________ ________________________________ Leading to the topic—— Global Warming. Draw readers’ attention by asking questions.
… the USA’s federal government , express reservations about whether global warming is really caused by human activities. Many people believe that they are simply not prepared to sacrifice the amount of money they make from industry to save the Earth.
Careful Reading Para.3&4
Finish the mind map.
Reasons of global warming increased industry Mostly pinned on human activities ____________ agriculture increased _________ forests the cutting down of _________ transport the increase in _________ the burning of fuels ____________________
Careful Reading Para.1 In your opinion, the purpose of para.1 is ________________________________ ________________________________ Leading to the topic—— Global Warming. Draw readers’ attention by asking questions.
… the USA’s federal government , express reservations about whether global warming is really caused by human activities. Many people believe that they are simply not prepared to sacrifice the amount of money they make from industry to save the Earth.
北师大高中英语选修八Unit22Lesson1GlobalWarming课件1
24
2 OK, you are right,somepoisionous chemical did escape into the atmospere. They admitted that some poisonous chemicals had escaped into the atmosphere. 3 Why don’t you drop in tonight? He /She/They invited me to drop in tonight.
22
Look at these sentences from the text and explain why the underlined verbs are not the same tense as the reporting verbs.
1 Recent report from the IPCC warned that global warming will cause dramatic climate changes. Because it is in the future
3
Traffic Jam
4
Factory
5
The Greenhouse Effect
The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60ºF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.
2 OK, you are right,somepoisionous chemical did escape into the atmospere. They admitted that some poisonous chemicals had escaped into the atmosphere. 3 Why don’t you drop in tonight? He /She/They invited me to drop in tonight.
22
Look at these sentences from the text and explain why the underlined verbs are not the same tense as the reporting verbs.
1 Recent report from the IPCC warned that global warming will cause dramatic climate changes. Because it is in the future
3
Traffic Jam
4
Factory
5
The Greenhouse Effect
The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earth’s average temperature would be about 60ºF colder. Because of how they warm our world, these gases are referred to as greenhouse gases.
高中英语Unit2SectionIWarmingUpReading配套课件北师大必修1.ppt
小组讨论 1．How many languages can you speak? Do you like them? 2．Do you think learning a foreign language is difficult? 3．Is learning foreign languages necessary and important? Why or why not?
Section Ⅰ Warming Up & Reading
Old English (450－1150 AD) The invading ( 侵 入 ) Germanic tribes ( 日 耳 曼 民 族 ) spoke similar languages, which in Britain developed into what we now call Old English.Old English did not sound or look like English today.Native English speakers now would have great difficulty understanding Old English.Nevertheless, about half of the most commonly used words in Modern English have Old English roots.The words, strong and water, for example, derive from Old English.
of the 16th century to today.
四、课文内容填空
At the end of the 16th century English was only spoken by people (1)__f_r_o_m___ England.They were the (2)__n_a_ti_v_e__ speakers.Today, the largest number of people speaking English may be in (3)__C_h_i_n_a__ because a lot of Chinese people learn and speak English as their foreign language.
Section Ⅰ Warming Up & Reading
Old English (450－1150 AD) The invading ( 侵 入 ) Germanic tribes ( 日 耳 曼 民 族 ) spoke similar languages, which in Britain developed into what we now call Old English.Old English did not sound or look like English today.Native English speakers now would have great difficulty understanding Old English.Nevertheless, about half of the most commonly used words in Modern English have Old English roots.The words, strong and water, for example, derive from Old English.
of the 16th century to today.
四、课文内容填空
At the end of the 16th century English was only spoken by people (1)__f_r_o_m___ England.They were the (2)__n_a_ti_v_e__ speakers.Today, the largest number of people speaking English may be in (3)__C_h_i_n_a__ because a lot of Chinese people learn and speak English as their foreign language.
北师大 英语 必修 8 Unit 22 Lesson1 Global Warming(共20张PPT
Unit 22 Environmental Protection Lesson 1 (2) Global warming
Careful reading(1)
Para.1 Para.2 Para.3 Para.4
Para.5
Introduction: Human beings are causing____ and it is believed that ________ could be one of the biggest______ in the 21st centry.
Consequences: If we continue to produce greenhouse gases______. There will be more______ such as floodings, heat waves and droughts.
Action: All governments have a responsibility to ____ and each person should_____.
Para.1 Introduction: Human beings are causing_c_h_a_ng_e_s_in_t_h_e_E_ar_t_h’_s_cl_im_a_t_e______ and it is believed that _g_lo_b_al_w_a_r_m_in_g______ could be one of the biggest___en_v_ir_o_nm__e_nt_a_l p_r_ob_l_em__s ___________ in the 21st centry.
floodings, heat waveson: All governments have a responsibility to __re_d_u_ce_t_h_e_a_m_o_u_nt_o_f_c_ar_b_o_n_d_io_xi_d_e________ and each person should___p_la_y_th_e_ir_p_a_rt_____.
Careful reading(1)
Para.1 Para.2 Para.3 Para.4
Para.5
Introduction: Human beings are causing____ and it is believed that ________ could be one of the biggest______ in the 21st centry.
Consequences: If we continue to produce greenhouse gases______. There will be more______ such as floodings, heat waves and droughts.
Action: All governments have a responsibility to ____ and each person should_____.
Para.1 Introduction: Human beings are causing_c_h_a_ng_e_s_in_t_h_e_E_ar_t_h’_s_cl_im_a_t_e______ and it is believed that _g_lo_b_al_w_a_r_m_in_g______ could be one of the biggest___en_v_ir_o_nm__e_nt_a_l p_r_ob_l_em__s ___________ in the 21st centry.
floodings, heat waveson: All governments have a responsibility to __re_d_u_ce_t_h_e_a_m_o_u_nt_o_f_c_ar_b_o_n_d_io_xi_d_e________ and each person should___p_la_y_th_e_ir_p_a_rt_____.
高中英语Unit 22 Lesson 1 Global Warming课件2 北师大版 选修8
Here are some key phrases from the text:
1. 2.
bpeuymonpdinotuormcoankteroilntoout
of
our
control
3. speed up drive fast
4. refer to means
5. trap…into… put in the trap
to consider or worry about consequence: something that happens
as a result of a direct action or set of
dramatic: great and sudden conditions energy-efficient: that helps to save energy
warming
at least three times in his speech.
6. The factory was producing greenhouse
gases__i_n__l_a__r_g__e__q__u__a__n_t_i_t_i.es
Understand these phrases:
into the atmosphere.
Lesson 1 Exx.9
3. He /She/ They invited me to drop in tonight.
4.
He /They ordered me to stand up immediately!
Lesson 1 Exx.9 5. He/She boasted that he/she was
6. radiate back send back
高中英语Unit 2 Global Warming section 1 PPT(通用)
n 1)句中makes后面的结构是复合宾语，其中it是形式宾 语，真正的宾语是第一个that引导的宾语从句。宾语从 句中又带有一个that引导的结果状语从句。
n 2)英语中，it用作形式宾语，宾语从句后置的情况有下 列种：
n ①宾语从句用于动词后面的复合结构（宾语+宾补）时， 常用it作形式宾语代替宾语从句，反真正的宾语从句后 置（注意这种结构中宾语从句的引导词that不能省略），
①if+形容词
If necessary, ring me at home.
②if/unless+过去分词
If not well managed, the factory may go bankrupt.
③if+介词短语
If in doubt, ask a policeman.
n ④其他固定用法：if any 如果有的话；if not 如果不能的 话；if so 如果这样的话；if ever 几乎；即使……也……
Unit2 global warming section 1
n 一、 key words n 1、predict (v.) 预知 预言 预报 n 例如： People are predicting an earthquake tomorrow!
人们预测明天会有地震！
n 2、absolutely.
n 1）完全地，极其：Absolutely impossible! 绝对不可能的 n 2）肯定地，绝对地 refuse Absolutely!
n 2)by ~ of 用…方法，靠…手段：
n Thouthts are expressed by ~ of words. n 3)by no ~ 决不，并没有
n He is by ~ no an honest man. n 4)be under way 是固定词组，表示“在进行；在举行；
n 2)英语中，it用作形式宾语，宾语从句后置的情况有下 列种：
n ①宾语从句用于动词后面的复合结构（宾语+宾补）时， 常用it作形式宾语代替宾语从句，反真正的宾语从句后 置（注意这种结构中宾语从句的引导词that不能省略），
①if+形容词
If necessary, ring me at home.
②if/unless+过去分词
If not well managed, the factory may go bankrupt.
③if+介词短语
If in doubt, ask a policeman.
n ④其他固定用法：if any 如果有的话；if not 如果不能的 话；if so 如果这样的话；if ever 几乎；即使……也……
Unit2 global warming section 1
n 一、 key words n 1、predict (v.) 预知 预言 预报 n 例如： People are predicting an earthquake tomorrow!
人们预测明天会有地震！
n 2、absolutely.
n 1）完全地，极其：Absolutely impossible! 绝对不可能的 n 2）肯定地，绝对地 refuse Absolutely!
n 2)by ~ of 用…方法，靠…手段：
n Thouthts are expressed by ~ of words. n 3)by no ~ 决不，并没有
n He is by ~ no an honest man. n 4)be under way 是固定词组，表示“在进行；在举行；
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7
Which countries do you think contribute more to global warming?
Dae)vdeleovpeelodpceoducnotruienstr–iesmore industry and tebc)hndoevloegloy.ping countries
15
Read the text and answer the questions.
1. What human activities are causing global warming? 2. By how much has the global average temperature
animals
2
Brainstorming
Question: What do you know about global warming?
/b/108435/3369510.html
3
Raising the Earth’s temperature will cause substantial melting of the polar ice caps which will then lead to a rise in the sea level and subsequent flooding of low-lying areas.
warming. E. What cause global warming
12
Scanning:
Scan the text below for these words and work out their meanings.
consensus, bounce, agriculture, coincidence, condemn, reservation,
14
condemn reservation sacrifice advocate
•the action of reserving something •to recommend or support publicly •to give up (something important or valued) because of other considerations •sentence to a particular punishment, especially death
Lesson 1 Global Warming
1
soil pollution
water pollution
sandstorm
forestation
ቤተ መጻሕፍቲ ባይዱ
Environmental problems?
noise pollution
air pollution
global warming
desertification endangered
6
There have been several summits of governments to discuss this problem but many countries don’t want to make changes to their factories and industrial works as this would cost them money.
sacrifice, advocate
13
Scan the text below for these words and work out their meanings.
consensus bounce agriculture coincidence
•a remarkable concurrence of events by chance •move quickly up, back, or away from a surface after hitting •a general agreement •the science or practice of farming
10
While-reading: Skimming
Question: What is global warming?
Global warming means an average increase in the Earth’s temperature which leads to climate change.
8
Part II
Pre-reading
Can we take the heat?
9
Pre-reading
Guessing:
Based on the title and the following pictures, can you guess what’s the meaning of the word “take”?
11
While-reading: Skimming Read the text and find main idea of each paragraph.
Para 1. Para 2. Para 3. Para 4. Para 5.
A. Draw readers’ attention to the topic by asking questions. B. What should human beings do. C. What is global warming. D. Consequences of global
4
Global warming will also change countries’ climates and cause huge food and water shortages.
5
Most environmentalists agree that global warming is an unnatural phenomenon caused by the emissions from burning carbon fuels such as coal, oil and petrol; they call this the “greenhouse effect”.
Which countries do you think contribute more to global warming?
Dae)vdeleovpeelodpceoducnotruienstr–iesmore industry and tebc)hndoevloegloy.ping countries
15
Read the text and answer the questions.
1. What human activities are causing global warming? 2. By how much has the global average temperature
animals
2
Brainstorming
Question: What do you know about global warming?
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3
Raising the Earth’s temperature will cause substantial melting of the polar ice caps which will then lead to a rise in the sea level and subsequent flooding of low-lying areas.
warming. E. What cause global warming
12
Scanning:
Scan the text below for these words and work out their meanings.
consensus, bounce, agriculture, coincidence, condemn, reservation,
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condemn reservation sacrifice advocate
•the action of reserving something •to recommend or support publicly •to give up (something important or valued) because of other considerations •sentence to a particular punishment, especially death
Lesson 1 Global Warming
1
soil pollution
water pollution
sandstorm
forestation
ቤተ መጻሕፍቲ ባይዱ
Environmental problems?
noise pollution
air pollution
global warming
desertification endangered
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There have been several summits of governments to discuss this problem but many countries don’t want to make changes to their factories and industrial works as this would cost them money.
sacrifice, advocate
13
Scan the text below for these words and work out their meanings.
consensus bounce agriculture coincidence
•a remarkable concurrence of events by chance •move quickly up, back, or away from a surface after hitting •a general agreement •the science or practice of farming
10
While-reading: Skimming
Question: What is global warming?
Global warming means an average increase in the Earth’s temperature which leads to climate change.
8
Part II
Pre-reading
Can we take the heat?
9
Pre-reading
Guessing:
Based on the title and the following pictures, can you guess what’s the meaning of the word “take”?
11
While-reading: Skimming Read the text and find main idea of each paragraph.
Para 1. Para 2. Para 3. Para 4. Para 5.
A. Draw readers’ attention to the topic by asking questions. B. What should human beings do. C. What is global warming. D. Consequences of global
4
Global warming will also change countries’ climates and cause huge food and water shortages.
5
Most environmentalists agree that global warming is an unnatural phenomenon caused by the emissions from burning carbon fuels such as coal, oil and petrol; they call this the “greenhouse effect”.