Unit 4 Global Warming

How did come about? the snow catastrophe Some scientists believed that global warming was one of the major reasons why such extreme climate like severe storms and heavy snow frequently came about. 孙广勇 造成极端天气频繁的一个重要原因就是全球变暖。

Think about : What causes global warming? Human activity or a random but natural phenomenon? When we talk about this problem, we naturally link it to the use of energy and the environmental pollution.

But firstly and importantly, energy makes a great difference to our lives. What things do we use energy for? We ____________energy to do many things in our lives. For axample, energy ______our cities and ______our buildings. What other things do we use energy for?for depend on lightsheats

Things that use energy around us or at any other places: In a house

Where does all this energy come from? from

Place and the related energy Wind power wind

Place and the related energy a coal power station coal

Place and the related energy oil refinery （提炼厂） oil

Place and the related energy nuclear power station Uranium 铀

Place and the related energy solar panels （镶板） solar power

Place and the related energy a hydro-electric power （与水有关的） water

Energy at home,school … sources of energy things using energy Lights Lights Heating Heating Television Television Cassette player Cassette player Video recorder Video recorder Computer Computer Fridge Fridge Stove Stove Washing machine Washing machine Hairdryer Hairdryer  Coal  Oil  Natural gas  Wind (wind power)  Sun (solar energy)  Uranium (nuclear energy)  Water (hydro-electric power)

Energy at home, school … sources of energy renewable or non- renewable  Coal  Oil  Natural gas  Wind (wind power)  Sun (solar energy)  Uranium (nuclear energy)  Water (hydro-electric power)  Non-renewable  Renewable  Non-renewable  Renewable

Let’s try to save energy! To save energy is to save our earth!! Slogan ['sləugən] ---- n. 标语, 口号

As we know, coal, oil and natural gas are called __________________, which is a kind of energy. It can make a great __________to our lives. But do you know what by________ is produced when we burn fossil fuel? Is it good for our planet? What ph__________ is caused by it?it difference enomenon product fossil fuel

Fossil Fuel

Carbon dioxide Fossil Fuel coal oil natural gas global warming ● ● ● ● ● ●● ● ● ● ● ● Why?

Picture reading A greenhouse

greenhouse

Picture reading A greenhouse is made of _______ and is used for growing ________, especially during _____ weather. What is a greenhouse made of and used for? glass plants cold

The air inside is warm because the glass ______ the heat from the sun and keeps it from _________. This makes the greenhouse __________ and so the plants can grow _______________. traps escaping heat up throughout the cold period How does a greenhouse work?

Now can you connect global warming with greenhouse and think of the relationship between them? Maybe you can understand why we call global warming “greenhouse effect”, right?

25 品质来自专业 信赖源于诚信 金太阳教育网 What’s greenhouse effect?

26 品质来自专业 信赖源于诚信 金太阳教育网 greenhouse effect

Surely we need greenhouse gases. Without greenhouse effect, the earth would be___________. In the atmosphere surroudning the earth there are gases called “greenhouse gases”. What do you think greenhouse gases do? It is a pity that human activity gives off extra ______________into the atmosphere therefore it causes______________. too cold carbon dioxide global warming

Reading

Task 1 Skimming Skim the title: THE EARTH IS BECOMING WARMER – BUT DOES IT MATTER? What is the main topic? A. The earth. B. Global warming. C. Becoming warmer doesn’t matter.

Who wrote the article? What is the name of the magazine? What are the names of the 3 scientists? Sophie Armstrong Earth Care Dr Janice Foster, Charles Keeling, George Hambley P 27 Ex.1 Listen to the magazine article and answer the following questions. Comprehending One

Skimming The organization of an expositive: Introduction A title Body Conclusion

Skimming the main text Skim the main text: Para. 1 Para. 2-3 I II Para. 4-8 III Para. 9 IV ★ ★ ★★ Introduction Body Conclusion

Skimming Match the parts with the main ideas: Explain how global warming comes about.Explain how global warming comes about. List two different attitudes among scientists towards global warming. List two different attitudes among scientists towards global warming. Introduce a debate over global warming. Introduce a debate over global warming. It’s up to readers to think and decide whether people should do something about global warming or not. It’s up to readers to think and decide whether people should do something about global warming or not.I(1) II (2-3) III (4-8) IV (9)

Scanning Match the parts with the writing skills: Usinga question, leaving readers to think over the issue Using a question, leaving readers to think over the issue Raising a question Raising a question Giving examples, making contrast (comparison) Giving examples, making contrast (comparison) Giving examples, using graphs, explanation Giving examples, using graphs, explanationI(1) II (2-3) III (4-8) IV (9) I(1) II (2-3) III (4-8) IV (9)

Page 27 Ex.2 T or F 1.The temperature in the last century didn’t seem to increase much. 2.Everyone believes that global warming is caused by the activities of humans. 3.Janice Foster believes that she can measure the future global rise in temperatrue 4. The rise in carbon dioxide is causing a steady in crease in global warming. 5. George Hambley believes scientists are just guessing about the effects of global warming. 6. It is clear what the effects of global warming will be.

1.The temperature in the last century didn’t seem to increase much. 2.Everyone believes that global warming is caused by the activities of humans. 3.Janice Foster believes that she can measure the future global rise in temperatrue T T F Line 2 : … it is a rapid increase compared to most natural changes… Line 5 : There is doubt that…

4. The rise in carbon dioxide is causing a steady in crease in global warming. 5. George Hambley believes scientists are just guessing about the effects of global warming. T T 6. It is clear what the effects of global warming will be. F Line 45: No one knows…

Idea-sharing We should do nothing about global warming. Group A 2 Ss 2 Ss agree reasons Group B 2Ss disagree reasons Debate

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