课件48张PPT。Yitian wgpUnit 4 Global WarmingSave the earth! Reading IIWhat can we do about global warming?Floodsmelting glaciers(冰川), rising sea levels and floodsdroughtdroughts and desertificationfamines diseasescoral reefs珊瑚礁golden monkeyfishginkgo银杏destruction of species Summary
We should do something about global warming. Because it could have many negative effects on the earth. With the temperature increasing, the polar ice caps eventually would melt, causing sea levels to rise by several meters. Coastal and low-lying cities would be submerged(淹没). Some scientists predict severe storms, droughts, famines, the spread of diseases and the destructions of species. Listen to the tape and answer:1.Who are the writers of the letters?2.Which is not the reason why Ouyang Guang writes the letter?3. Which is not true according to the editor’s letter?1.Who are the writers of the letters?A. He is doing a project on global warming. B. He feels individuals can affect huge environmental problems. C. He isn’t sure where to start with his project. D. He wants to get some suggestions from Earth Care.Ouyang Guang and the editor of Earth Care2.Which is not the reason why Ouyang Guang writes the letter?3. Which is not true according to the editor’s letter?A. Together, individuals can make a difference to environmental problems. B. Individuals must put up with pollution. C. Many activities individuals do can produce carbon dioxide. D. Individuals can save energy to slow down global warming.put up with: accept sb / sth that is unpleasant 忍受,容忍put up with, stress of studyReading:
Skim the first letter, and answer the questions below:
What is the purpose of the email? / What are the two concerns of the email?① His opinion that, as an individual, he can have no effect on environmental problems.
② Getting some suggestions for what he can do about global warming ; Read the second email, and answer the question:
Do Earth Care agree with Ouyang Guang’s opinion that individuals can have no effect?No, Earth Care dose not agree.Now scan the letter and list Earth Care’s suggestions in the chart on P30, and discuss whether you can carry out each suggestion. Give reason for you answers.If you are not using electrical appliances, turn them off. YesSave energyIf you’re cold, put on more clothes instead of turning up the heat.YesSave energyMotor vehicles use a lot of energy, so walk or ride a bike if you can.YesSave energyRecycle cans, bottles, plastics and newspapers and buy things made from recycled materials.YesSave energyGet your parents or friends to buy products that are made to save energy.YesSave energyPlant more treesYesPlants absorb carbon dioxide from the airTalk with your family and friends about global warming and tell them what you’ve learned.YesTogether, individuals can make a difference.Summary1.Turn_________________off if not using them.2._________________ instead of turning up the heat.Walk or ride a bike if you can.4.Recycle cans, bottles, plastics and buy things made from_______________.Buy products that___________________.Plant more trees.7.Talk with __________________ about global warming.electrical appliancesPut on more clothesrecycled materialsyour family and friends5.3.6.are made to save energyWhat can we do about global warming?
Read the two letters and make a list of what can an individual do to prevent global warming.If you are not using an electrical appliance, turn it off!
put on more clothes instead of turning up the heat.
walk or ride a bike if you can.
buy things made from recycled materials.
buy products that are made to save energy.
plant trees1.Sometimes I feel that individuals cannot have any effect on such huge environmental problems.
sometime: 在某时 some time 一段时间
sometimes: 有时；间或
individual [n.] [adj.] 个人；个人的
The rights of the individual are considered to be the most important in a free society.
This is not only a crisis of individuals, but also of a society.
She is a real individual.
Each individual boy in the class has his own personalities.
She wears very individual dresses.2.Together, individuals can make a difference.
make a/no/some/much… difference to/in sb/sth.有(没，一些，很大)影响，起作用
The rain didn’t make much difference to the game.
Your age shouldn't make any difference to whether you get the job or not.
Changing schools made a big difference to my life.
--Shall we go at 6:00 or 7:00?
--It makes no difference to me.3. We do not have to put up with pollution.
They surrendered without putting up much of a fight.
The team put up a great performance.
put up an argument/case/question
We can put you up for the night.
Bush was put up as a candidates in the election.
put up a flag
They have put up the rent by $20 a month.
A local businessman has put up the $500,000 needed to build the school.put up with sb/sth.
I don’t know how she put up with him.
I’m not going to put up with their smoking any longer.4. It’s OK to leave an electrical appliance on so long as you are using it—if not, turn it off!
so long as = as long as
As long as you've offered, I accept.
We’ll go for a picnic so long as the weather is good.
electrical-electric
electrical常与概括性的名词搭配,如:equipment
但现代英语中两词区别不大。
electrical-electronic
electrical: 电气的；电动的；用电的；发电的
electronic: 电子的
electronic computer5. Motor vehicles use a lot of energy.
motor [n.] [adj.]
发动机；马达；汽车
有引擎的；机动车的；汽车的
motorbike
motorcycle
motorcar
motor boat
motorway(英国)
motor-home
motor-mouthGroup DiscussionWhat else should our government do to slow down global warming?1.Give money to green the surroundings and protect the forests.2.Encourage people to find and use more renewable energy.3.Make laws to protect rare plants and animals .green the surroundingsuse renewable energyrare plantsrare animalsRole playA: a journalist of Earth Care magazineB: a climate specialistTask:Talk about the effects of global warming.Talk about what the government should do .Talk about what individuals should do.Call on people to protect the earth and design a slogan(口号）. A is interviewing B about global warming.A: Hello, Mr…(Good morning) B: Hello, Miss… A: As a climate specialist,…You can begin like this:Useful expressions:What do you think…? What effects would it bring us? What should… do? What are the ways to save energy? That’s it. You’re right. We(They) should…G1:Effects of global warming G2: What the government should do G3:What individuals should do G4:Call on people and design sloganReading task on 661.What are in the pictures?
2.How many cigarettes are smoked in China each year?
3.How many butts are littered worldwide?
4. What do butts contain?
5. Why is this a problem?
6. How long do they take to break down?
7.What are plastic bags made from?
8. Why is this a problem?
9. How long do they last?
10. Where do they end up?
11. Why are they such a problem for sea animals?Reading Task (P66)Clean Up Your Butts And BagsWhat are in the pictures?
There are cigarette butts and plastic bags.2.How many cigarettes are smoked in China each year?
Over 1,600 billion cigarettes are smoked each year in China.
3.How many butts are littered worldwide?
About 4.5 trillion butts are littered every year.
4. What do butts contain?
Butts contain some very toxic chemicals.
5. Why is this a problem?
Because butts spoil the beauty of the environment ,the toxic chemicals in butts find their way into the water supply where they decrease the quality of the water and endanger plants and animals that live there.
6. How long do they take to break down?
They take up to 5 years to break down.
7.What are plastic bags made from?
They are made from oil and gas, which are non-renewable resources.
8. Why is this a problem?
Because they are not recycled, these resources are lost to us.
9. How long do they last?
They last from 20 to 1000 years in the environment.10. Where do they end up?
They float easily in air and water and travel long distances. They find their way to rivers , parks, beaches and oceans.
11. Why are they such a problem for sea animals?
Because they kill up to one million seabirds, 100,000 sea mammals and countless fish each year worldwide. When the animal dies and breaks down, the plastic bag can become free again to kill another animal. Ex.1
4. Tom’s solutions:
Put them in the rubbish bin.
Not to let plastic bags become litter.
It would be better if they used fewer.
Recycled them.
Not to smoke.
Not use plastic bags at all.Clean up Your Butts and Bags Read Tom’s essay about litter. Make a summary for each paragraph, and then fill in the following table.Cigarette buts and plastic bags are a serious environmental problem.Butts are small but are still bad for the environment.1600 billion cigarettes are smoked each year in China. Many of these become litter.
4.5 trillion butts are littered every year in the world.
Butts are ugly.
Butts contain toxic chemicals. These get into the water supply. These decrease the quality of the water and endanger living things.
Butts take up to 5 years to break down, so the toxic chemicals add up to a great amount.Evidence:Plastic bags are a danger to the environment.1.Plastic bags are made from non-renewable resources. If they are not recycled, these resources are lost to us.
2.In china, 2 billion plastic bags are used every day.
3.Plastic bags last from 20 to 1,000 years in the environment.The environment would be less polluted if we cleaned up cigarette butts and plastic bags. The best solution would be not to smoke or use plastic bags at all.1.clean up
彻底清理；整理
clean up the desk 整理书桌
清理掉；清除
The waiter hurried to clean up the pieces of the broken plates.
服务员赶紧把盘碟的碎片打扫干净。
2. break down
v.毁掉, 制服, 压倒, 停顿, 倒塌, 中止, 垮掉, 分解,起化学变化
1)Food is broken down by chemicals.
化学物质引起食物转化。
2) ...because they can take up to five years to break down.Language Points3. up to
（数目）到…之多
up to 100 men 可达一百人
直到（某个高级职务）
Everyone works, from the lift boy up to the President.
从电梯工人到总经理人人都工作。
一直到 (= up till)
up to now 到目前为止,
胜任
Michael's not really up to that job.
迈克尔确实不胜任那项工作。
be up to 做（坏事）
What in the world are you up to? 你到底在搞什么鬼？up to sb. 应由某人……, 视为某人的职责
It’s up to us( = It’s our duty) to give them all the help we can.up to date
现代的；最新的
It was a modern factory - everything was really up to date.
这是一个现代化的工厂──一切都是最新式的。
I like wearing up-to-date clothes.
我喜欢穿时新的衣服。
I keep up to date with the news by listening to radio.
我通过听收音机了解最新消息,包括最新资料的.add up to
总计为，总数达4. trillion 万亿
5.apart from 除…外
1) All the children like music apart from Bobby.
除了博比外所有的孩子都喜欢音乐。
2)The writer lives apart from his family.
作家不与家人同住。
3) Apart from a few words, I do not know any French at all.
除了很少的几句外,我对法语一无所知。Homework
Make four sentences with "it" for emphasis.
AssignmentHome work: Writing an article
How to Fight Global WarmingDemands:1.Write it according to the four topics in the dialogues. 2. Words: About 100
