1、必修二 Unit 6 Earth first (4) 高一年级 英语 Developing ideas Whats really green? Reading Look at the questions about “green living” and tick your answers. Pre-reading Pre-reading 1. Which shopping bag is more environmentally friendly? A plastic bag. A paper bag. Neither of these. Pre-reading 2. What should y
2、ou do to save energy when leaving your home? Turn off a device. Unplug a device. Neither of these. Pre-reading 3. What food is better for the environment? Food produced near to where you live. Food produced far from where you live. It depends. Pre-reading 4. Which uses less water? Taking a bath. Tak
3、ing a shower. It depends. Its “really”. Prediction Q1.Whats the key word in the title? Look at the title, answer the two questions and try to predict. Prediction Q2. What does “really” imply(暗示)? The information mentioned in the passage may not be true. While-reading Q. Do you find something special
4、 in this passage? Skim the passage and answer the question. While-reading Q. Do you find something special in this article? There are four subheadings. 1. Expand on the main heading or title. 2. Be slight longer than the main heading. 3. Give an overall understanding of the content of a text. What a
5、re subheadings? Learning to learn Structure ? Subheading 1 Subheading 2 Subheading 3 Subheading 4 ? While-reading Task 1.Read the first and the last paragraphs and answer the questions. Q1.What is the first paragraph about? While-reading Most of us are aware that we must take care of the environment
6、, and the majority of us take steps to save energy and reduce waste and pollution. But recently, some “green truths” have been shown to be only half true, or even completely false. Here are some common ones. Which are really green? Structure Introduction Subheading 1 Subheading 2 Subheading 3 Subhea
7、ding 4 (“green truths”) (“green truth 1”) (“green truth 2”) (“green truth 3”) (“green truth 4”) ? While-reading Q2. What is the last paragraph about? While-reading Environmental awareness is now part of daily life. But its worth checking common ideas and opinions to see whats really green. Structure
8、 Introduction Subheading 1 Subheading 2 Subheading 3 Subheading 4 Conclusion (“green truths”) (“green truth 1”) (“green truth 2”) (“green truth 3”) (“green truth 4”) (check to see) While-reading Task 2. Read the first “green truth” and decide if the statement in subheading 1 is true or false. Why or
9、 why not? While-reading Read the first paragraph of subheading 1 and answer question 1. Q1. Are plastic bags good for the environment? Why or why not? ? Paper shopping bags are better than plastic ones. “Green truth 1” While-reading Plastic bags cause litter and are a danger to wild animals, which m
10、istake them for food. It takes hundreds of years for plastic to break down, ? Paper shopping bags are better than plastic ones. cause litter, are a danger to wild animals, take hundreds of years to break down Plastic bags are bad for the environment. CAUSES EFFECTS While-reading Read the second para
11、graph of subheading 1 and answer question 2. Q2. Are paper bags better than plastic ones? Why or why not? ? Paper shopping bags are better than plastic ones. While-reading However, making a paper bag uses four times as much energy as making a plastic bag and up to three times the amount of water. Th
12、e process also produces more greenhouse gases. ? Paper shopping bags are better than plastic ones. use more energy, use more water, produce more greenhouse gases Paper bags are not better than plastic ones. CAUSES EFFECTS While-reading ? Paper shopping bags are better than plastic ones. Read the las
13、t paragraph of subheading 1 and answer question 3. Q3. Whats really green? While-reading In fact, both kinds of bags are bad for the environment. So, take a reusable bag with you when you go shopping. Both are bad for the environment. ? Paper shopping bags are better than plastic ones. 1. Plastic ba
14、gs are bad for the environment. 2. Paper shopping bags are not better than plastic ones. Reusable bag is really green. While-reading ? Paper shopping bags are better than plastic ones. False. Is your answer in exercise 1 the same as the truth? “Green truth 1” While-reading Task 3. Read the next thre
15、e “green truths” and find out the causes, effects and whats really green. While-reading ? When you turn off a device, it stops using power. “Green truth 2” Whats really green? While-reading When we turn off a device, such as television, it goes into stand-by mode. Devices in this mode still use powe
16、r, and older devices in stand-by mode can use even more. This happens because electricity continues to leak from the device, even when it is turned “off”. ? When you turn off a device, it stops using power. go into stand-by mode, still use power, use even more, electricity continues to leak Turning
17、off a device wont stop using power. CAUSES EFFECTS While-reading To make sure your appliance is in fact off, remove the plug from its power supply. ? When you turn off a device, it stops using power. go into stand-by mode, still use power, use even more, electricity continues to leak Turning off a d
18、evice wont stop using power. CAUSES EFFECTS Remove the plug from its power supply. While-reading ? When you turn off a device, it stops using power. False. “Green truth 2” Is this truth beyond your expectation? While-reading ? Eating local food is good for the environment. “Green truth 3” Whats real
19、ly green? While-reading It seems like common sense: eating local food should be better for the environment, because it does not need to be transported long distances and kept cold during transport .Unfortunately, it is not that simple. It is the production of food, not its transport , that uses most
20、 of the energy and produces most of the greenhouse gases. While-reading In some cases, local produce might have used more energy and produced more greenhouse gases than produce grown a long way awayeven taking into account its transport. ? Eating local food is good for the environment. use more ener
21、gy, produce more greenhouse gases, take into account its transport Eating local food is not always good for the environment. CAUSES EFFECTS It depends. While-reading ? Eating local food is good for the environment. False. “Green truth 3” Does the truth surprise you? While-reading ? Its better to tak
22、e a shower than a bath. “Green truth 4” Whats really green? While-reading It depends on how long you spend in the shower and how large your bath is. If you spend more than eight minutes in a shower, youll use as much water as in a bathabout 50 litres of water. Therefore, the key is to keep your show
23、er time as short as possible. ? Its better to take a shower than a bath. If you spend more than eight minutes in a shower, youll use as much water as in a bath about 50 litres of water. Its not always better to take a shower than a bath. CAUSES EFFECTS Keep shower time as short as possible. While-re
24、ading ? Its better to take a shower than a bath. False. “Green truth 4” What is your answer to this question in exercise 1? While-reading Lets check to see if all your answers in exercise 1 are correct. These so-called truths often make people confused and they are really worth checking. While-readi
25、ng Task 4. What is the genre (文体) of the passage? Editorial 社论文 (to make an authoritative comment) 权威性的评论 Summary How does this editorial develop? CAUSES EFFECTS Whats really green? Post-reading Task 5. Read the effects and complete the causes of these according to the passage. Post-reading CAUSES E
26、FFECTS 1. Making a paper bag uses more energy and water than making a plastic bag. It also produces more greenhouse gases. Paper bags are not good for the environment. Post-reading CAUSES EFFECTS 2. Turning off a device wont stop it from using power. Devices turned off go into stand-by mode and stil
27、l use power. Post-reading CAUSES EFFECTS 3. Eating local food isnt always better for the environment. Local produce sometimes might use more energy and produce more greenhouse gases than produce grown a long way awayeven taking into account its transport. Post-reading CAUSES EFFECTS 4. Its not alway
28、s better to take a shower than a bath. If you spend more than eight minutes in a shower, youll use as much water as in a bath about 50 litres of water. Post-reading Task 6. What is the authors purpose in writing the passage? Post-reading 1. To introduce us some misunderstandings about environmental
29、protection in daily life. 2. To tell us whats really green. 3. To teach us to use critical thinking to judge so-called truths. 4. To call on us to protect the environment. Post-reading Task 7: Give a talk about one of the “green truths” in the passage. Post-reading 1. Use these questions to help pla
30、n your talk. Which “green truth” are you going to talk about? Why do people believe it is “green”? Why is it not completely true? What can you do to become “greener”? Post-reading 2. Organise your talk following the steps below. Start your talk by stating the topic. Describe your chosen “green truth
31、” in more detail. Explain why it is not completely “green”. End your talk by encouraging your audience to become “greener”. Post-reading 3. Give your talk to the class. Post-reading Sample answer: Today I would like to talk about if paper shopping bags are better than plastic bags. Post-reading As e
32、veryone knows, plastic bags cause litter and are a danger to wild animals. It takes hundreds of years for plastic bags to break down. Therefore, plastic bags are bad for the environment. Post-reading Because of this, some people think paper bags are better than plastic ones. But that is not true. Ma
33、king paper bags uses much more energy and water. It also produces more green house gases. So we come to the conclusion that paper bags are not environmentally friendly, either. Post-reading Since both of the above are not good for the environment, whats really green? I suggest taking a reusable bag
34、with you when shopping. It is really green. Starting from the small things around us, everyone can become a real “greener”. Post-reading Task 8: Are you aware of any other “green truths” that are not true? Share them with us. CAUSES EFFECTS Post-reading Sample answer: I would like to talk about whic
35、h way of boiling water is more environmentally friendly, with gas or with electricity. It is generally believed that using electricity to boil water is as environmentally friendly as using gas to boil water. Post-reading However, it is not that simple. As is the case, it is very convenient and econo
36、mical to boil water with electricity. But the heat from boiling water with electricity produces more greenhouse gases, even almost three times as much as heating water with gas. Post-reading Boiling water with gas can reduce carbon emissions(减少碳排 放)and generate heat(产生热量), especially in winter, whic
37、h helps raise the indoor temperature. Post-reading Therefore, it is more environmentally friendly to boil water with gas than with electricity. Choose one of the tasks to finish. 1. Give a talk to introduce one of the “green truths ” in the passage. 2. Share more “green truths” with the classmates on WeChat. Homework Thank you!
