1、北师大高二,Unit 22,Unit 22 Environmental Protection,Lesson 1 Global Warming,What is global warming?,Lead-in,What will happen with global warming?,Will global warming affect the life of North Polar Bear?,What will happen to penguins because of global warming?,What are the causes of global warming?,traffic
2、,Factory,The Greenhouse Effect,Without the greenhouse heating, the Earths average temperature would be only about -73 C (-100 F); even the oceans would be frozen under such conditions, just like the Moon and the Mars.,Mars,Moon,Which countries do you think contribute more to global warming? a) devel
3、oped countries b) developing countries,Developed countries - more industry and technology,After we learn this lesson, we can get all the answers to the quetions. Lets go!,Para 1 Para 2 Para 3 Para 4 Para 5,What can we do to reduce global warming What global warming is and how it works Reasons and it
4、s effects Draw readers attention to the topic by asking questions-introducing the consequence of global warming,Listen to the tape of the text and match the heads with the paragraphs.,1) What is global warming? Global warming is an average increase in the Earths temperature that leads to clilmate ch
5、ange. 2) What human activities are causing global warming? Industry, agriculture, the cutting down of forests, the increase in transport and the burning of fuels are causing global warming.,Read the text and answer the questions.,3) By how much has the global average temperature increased in the las
6、t 100 years? By 1F (One degree Fahrenheit) 4) Are greenhouse gases necessary for life on Earth?Yes, they are. Because they trap heat from the sun in the Earths atmosphere. Otherwise the Earth would be cold and unsuitable for life.,5) How can we help solve the problem of global warming? We can make s
7、mall changes like taking public transport, recycling, using low-flow shower heads, and buying energy-efficient light bulbs to help stop global warming.,Fill in the blanks about the text.,Global warming means an average increase in the Earths temperature which causes climate change in turn. Scientist
8、s think it is _ _ that cause global warming, especially gases from _ and vehicles which speed up global warming.,factories,human beings,They also think global warming is one of the biggest environmental problems in the 21st century. The Earths temperature is controlled by _ _ like carbon dioxide whi
9、ch _ heat from the sun in the Earths atmosphere. Many experts believe global warming is mainly caused,greenhouse,gases,trap,by human _. Over the last 100 years, the global average temperature has increased _ and if human beings continue to pump _ gases into the Earths atmosphere, the global warming
10、will cause dramatic climate changes like more frequent floods, _ and droughts.,by 1F,greenhouse,heat waves,activities,There are some serious diseases. Sea level will be _, floating coastal area, negatively affecting _ and forestry. So governments all over the world should reduce the _ of greenhouse
11、gases. We individuals should pay _ to what we are doing, even,raised,fishing,release,attention,small changes like _ public transport, _, using low-flow _, buying energy-efficient _ using recycled paper or _ lights can have _ on the future of the Earth.,taking,recycling,shower heads,light bulbs,switc
12、hing off,great effect,What will you do every day to help reduce greenhouse gases?,Post-reading,Group Work,Taking public transport like buses can reduce greenhouse gas emissions.,And Taking train can also help a reduction of greenhouse gas.,The recycling symbol,Buy the recycled products,Recycled prod
13、ucts,Recycling the bottles,Your glass bottles could be recycled into house insulation, plastic bottles could be made into a cozy fleece jacket.,Paper recycling,Your paper could become part of a road or race-track.,using low-flow shower heads,buying energy-efficient light bulbs,replace,with,Ride bicy
14、cles,Say “No” to plastic bags,Plant trees,1. In the last few decades, scientists have reached consensus and reported that human beings are causing changes in the Earths climate-something previously seen as beyond our control.,Language points,分析 本句是一个主从复合句。reached和reported是并列谓语动词，reported后接一个that引导的宾
15、语从句，其中something作 _ 的同位语，previously seen as beyond our control为过去分词短语作something的定语。beyond ones control意为“超出的控制，不受的控制”。,changes in the Earths climate,句意 最近几十年，科学家们一致认为，人类正在引起地球的气候变化而这在以前看来是我们不能控制的。 仿写 Due to circumstances _ _ _, the performance had to be cancelled. 因为我们无法控制事态，演出不得不被取消。,beyond,our cont
16、rol,2. They claim that in the last 50 years, gases pumped into the Earths atmosphere by the factories and vehicles have been speeding up the process of global warming and affecting our climate.,分析 本句是一个主从复合句。that从句作claim的宾语；在该从句中，主语为gases，speeding up和affecting作并列谓语动词，affecting前省略了have been；pumped in
17、to . vehicles是过去分词短语作定语，修饰 _，相当于定语从句that / which are pumped into . vehicles。,gases,句意 他们声称，在过去的五十年间，工厂和汽车排放入大气层中的气体加速了全球变暖的进程，影响了我们的气候。,3. Global warming refers to an average increase in the Earths temperature that, in turn, leads to climate change. 全球变暖指的是地球温度平均增长，继而导致气候变化。,refer to,提到, 谈到,e.g. Don
18、t worry. I dont think the manager referred to you. 别担心，我想经理说的不是你。,Promise me not to refer to the matter again. 答应我不再提此事了。,lead to 意为“通向；引起；导致”。to 为介词，后接名词或动词-ing形式。,e.g. We couldnt find the roads leading to / that led to the valleys. 我们找不到通往山谷的路。,The discovery of new evidence led to _. the thief hav
19、ing caught B. catch the thief C. the thief being caught D. the thief to be caught,Eating too much sugar can lead to health problems. 食用过多的糖会引起健康问题。,考考你,点拨 选C。lead to后接名词或动词-ing形式，故排除B、D；根据语境可知小偷应该被抓住，故用被动语态，排除A。,4. Scientists found that the temperature of the Earth is controlled by greenhouse gases
20、such as carbon dioxide which trap heat from the sun in the Earths atmosphere.,分析 本句是一个主从复合句。that引导的宾语从句指的是客观事实，所以用了一般现在时；which引导定语从句，修饰_。such as 在此相当于介词like，意为“像那样，诸如之类”。 句意 科学家们发现地球的气温受温室气体如二氧化碳的控制，这些气体能将来自太阳的热量圈在地球的大气层里。,greenhouse gases,【仿写】 牛顿发现所有的物质都相互吸引。 Newton found that all masses _ _ _.,eac
21、h other,attract,Use the expressions below in the correct form to complete the sentences.,Exercises,beyond our control/ pump into/ as a result of/ in huge quantities/ refer to/ speed up,1. Water was _ the fish pond from the river. 2. We all need to _ to finish in time! 3. There is nothing more we can
22、 do. The situation is now _.,pumped into,speed up,beyond our control,4. _ the accident, she is now afraid of water. 5. The scientist _ global warming at least three times in his speech. 6. The factory was producing greenhouse gases _.,As a result of,referred to,in huge quantities,Write an essay about what you will do to live a low-carbon lifestyle with 100 words.,Homework,Thank you!,
