1、Unit,2,Protecting Our Planet,Book 4,Think and Discuss,Viewing the World,Exploring the Theme,Analytical Listening,Sharing Your Ideas,Engaging,Further Listening,Content,Think and Discuss,Unit 2 Protecting Our Planet,Questions,An endangered turtle floats over a dead coral reef.,1. Look at the photo and
2、 read the caption. What do you imagine this scene looked like 50 or 60 years ago? What caused the change? 2. What are some reasons that animals become extinct? 3. Who do you think should be responsible for protecting endangered species? Governments? Companies? Citizens?,Example Answers Fifty or 60 y
3、ears ago, the scene was probably much more colorful, with different species of live coral and different kinds of fish. The damage was probably caused by human activities such as commercial fishing or scuba diving. Rising ocean temperatures from global warming can also cause the death of coral reefs.
4、,Questions,1. Look at the photo and read the caption. What do you imagine this scene looked like 50 or 60 years ago? What caused the change?,Example Answers Species can become extinct due to over-hunting or over- fishing , climate change, loss of habitat, or competition from invasive species.,Questi
5、ons,2. What are some reasons that animals become extinct?,Example Answer 1 I think governments should be responsible for protecting endangered species because they have the power to pass and endorse laws that protect the species.,Questions,3. Who do you think should be responsible for protecting end
6、angered species? Governments? Companies? Citizens?,Example Answer 2 I think companies should be responsible for protecting endangered species because they sometimes cause environmental damage, and they have financial resources. Saving an endangered species might also be good for a companys public im
7、age.,Questions,3. Who do you think should be responsible for protecting endangered species? Governments? Companies? Citizens?,Example Answers 3 I think citizens should be responsible for protecting endangered species because governments and companies have not done enough. Citizens should join togeth
8、er to protect these species through education and public pressure on companies and governments.,Questions,3. Who do you think should be responsible for protecting endangered species? Governments? Companies? Citizens?,Exploring the Theme,Unit 2 Protecting Our Planet,Protecting Our Planet,Internationa
9、l Union for Conservation of Nature (IUCN): the worlds oldest and largest global environmental organization founded in 1948. With more than 1,200 member organizations, today it is a leading authority on the environment protection and sustainable development. Almost 11,000 scientists and experts from
10、the world do volunteer work for it. 世界自然保护联盟,A | Look at the photos and read the captions. Then discuss the questions.,1. Lions and other types of big cats are dying at a rapid rate. What do you think is the biggest threat to these animals? 2. If a plant species becomes extinct, what effect does thi
11、s have on the environment?,Protecting Our Planet,An African lion rests near a tree in Botswana. Over the past 20 years, many African lions have died.,Protecting Our Planet,Around the planet, human impact has resulted in the destruction of animal and plant life. Now conservationists are trying to sav
12、e these plants and animals from extinction. Once a plant or animal is extinct, there will be no living members of that species left on the planet.,Protecting Our Planet,Around the planet, human impact has resulted in the destruction of animal and plant life. Now conservationists are trying to save t
13、hese plants and animals from extinction. Once a plant or animal is extinct, there will be no living members of that species left on the planet.,Protecting Our Planet,Example Answers The biggest threat to big cats is probably hunting. People want their skins, or in some cases, they might think the bi
14、g cats are a threat to people or to domestic animals. Habitat loss could be another factor that is endangering big cats.,1. Lions and other types of big cats are dying at a rapid rate. What do you think is the biggest threat to these animals?,Protecting Our Planet,Example Answers If a plant species
15、becomes extinct, then any insect species or animal that depends on it could go without food and shelter. In addition, plants are important to the soil and the air, so losing a plant species could have several negative effects on the environment.,2. If a plant species becomes extinct, what effect doe
16、s this have on the environment?,Protecting Our Planet,B | Look at the chart. Then discuss the questions.,Each year, the International Union for Conservation of Nature studies plants and animals. Many of the species studied are threatened or at risk of dying. The graph shows the percentage of threate
17、ned species in each category. The numbers at the top of the bars show how many species were studied.,Protecting Our Planet,1. Which group is the most threatened? Which is the least? 2. Which categories of species are common in China?,Protecting Our Planet,Example AnswersTropical palms have the great
18、est percentage of species in danger, while lobsters, on the other hand, have the smallest percentage and number of species in danger. Therefore, tropical palms are the most threatened and lobsters are the least threatened.,Which group is the most threatened? Which is the least?,Protecting Our Planet
19、,Example Answers All of the categories of species are common in China except for tropical palms, which can be only seen in several provinces. Coral reefs used to be common in the oceans around China, but a majority of the reefs have been destroyed due to over-fishing and pollution.,2. Which categori
20、es of species are common in China?,Protecting Our Planet,Analytical Listening,Unit 2 Protecting Our Planet,Listening 1,dusky seaside sparrow n. 海滨灰雀（主要分布在美国佛罗里达州的梅里特岛，已经绝迹） habitat n.（植物的）生长地；（动物的）栖息地 Merritt Island 梅里特岛（位于美国东部佛罗里达州） steelhead trout n. 硬头鳟 enforce v. 执行，实施（规定或法律） Idaho 爱达荷州（美国西北部州）
21、deforestation n. 砍伐树林 buckwheat n. 荞麦,Listening 1,Endangered Species Act (ESA): a U.S. environmental law which was passed in 1973. It was designed to help protect plants and animals that are threatened by extinction as a result of human activities. 濒危物种法案,Listening 1,A | Predicting Content. Form a g
22、roup with two or three other students. Look at the photos and read the caption. Then discuss the questions below.,Listening 1,The dusky seaside sparrow was a bird species of southern Florida.,A | Predicting Content.,Listening 1,1. The dusky seaside sparrow is now extinct. What kind of habitat do you
23、 think this bird lived in? 2. What do you think are some possible causes for its extinction?,Listening 1,Example Answers,1. The dusky seaside sparrow is now extinct. What kind of habitat do you think this bird lived in?,The bird is sitting on a branch, so it must have lived in places with trees. Sou
24、thern Florida is also a warm place with a lot of wetlands.,Listening 1,Example Answers,2. What do you think are some possible causes for its extinction?,The bird may have become extinct because of habitat loss, environmental pollution, or disease. (Its a small bird, so people wouldnt want to hunt it
25、.),B | Note-Taking. Listen to the first part of a guided tour and look at a students notes. Notice the use of key words, indentations, abbreviations, and symbols.,Listening 1,C | Pair Work. Work with a partner. Using the notes from exercise B, retell the first part of the guided tour in complete sen
26、tences. Use your own words.,Listening 1,Listening 1,Example Answers The dead bird in the jar is the dusky seaside sparrow, a small bird that lived on Merritt Island in southern Florida, but which is now extinct. The species became extinct when people used chemicals to kill the mosquitos on the islan
27、d. Those chemicals altered the wetlands so they were no longer a good habitat for the sparrow.,Tour Guide: OK, everyone, heres our next exhibit. Do you see the body of the little bird in that bottle? That is a dusky seaside sparrow. It was an old male that died on June 16, 1987. Its kind of sad beca
28、use he was the very last dusky seaside sparrow in the world. Theyre now extinct. Yes, you have a question? Male: Do you know why they became extinct? Tour Guide: Basically, they lost their habitat. See, the dusky seaside sparrow lived only in one placeon Merritt Island in Florida. The island had a l
29、ot of mosquitoes and wetlands. The people on Merritt Island used chemicals to kill the mosquitoes. Those chemicals were also very harmful to the sparrows, and many died. In addition, the people on Merritt Island tried to control and exploit the wetlands. As they altered them, the wetlands were no lo
30、nger a good habitat for the sparrows. The birds died one by one until there werent any left.,Listening 1,A | Note-Taking. Listen to the guided tour and complete the notes. Be sure to use key words, abbreviations, and symbols. Notice the indentations.,A Guided Tour,Listening 1,Endangered Species Act
31、(ESA)1973 Protects animals and their _Ex.: _ Ongoing conflict between _ and _Ex.: _ ESA protects _; ranchers feel law violates _,habitats,steelhead trout in Washington state,landowners,government,gray wolf in Wyoming and Idaho,land,their rights,A | Note-Taking.,Listening 1,Endangered Species Today S
32、ituation today is _ than in 1973 1. _ species listed as _ or _ 2. Since 1973 only _ species removed from list 3. BUT only _ removed because they recovered; _ became extinct, others listed by mistake 4. _ more species may soon be added to list,worse, 1,300,endangered,threatened,39,14,9,300,A | Note-T
33、aking.,Listening 1,Conclusion Even w/ ESA in place, _ _,not making much progress,Listening 1,B | Listening for Main Ideas. Read the questions and answer choices. Then listen again and choose the correct answers. Use your notes from exercise A to help you.,1. What is the main topic of the talk? a. Wh
34、y the dusky seaside sparrow became extinct. b. The difficulties of protecting both animals and their habitats. c. Reasons that the Endangered Species Act isnt working.,b,Listening 1,B | Listening for Main Ideas. Read the questions and answer choices. Then listen again and choose the correct answers.
35、 Use your notes from exercise A to help you.,2. What does the Endangered Species Act protect? a. Endangered animals and their habitats. b. Endangered animals but not their habitats. c. Animal habitats but not endangered animals.,a,Listening 1,B | Listening for Main Ideas. Read the questions and answ
36、er choices. Then listen again and choose the correct answers. Use your notes from exercise A to help you.,3. What has happened since the passage of the Endangered Species Act? a. The number of species that are endangered has greatly decreased. b. The number of species that are endangered has increas
37、ed a lot. c. The number of species that are endangered has not changed much.,c,Listening 1,The Miami blue butterfly,Discussion. Work with your partner. How might the extinction of the dusky seaside sparrow have been prevented? Explain your ideas.,Tour Guide: OK, everyone, heres our next exhibit. Do
38、you see the body of the little bird in that bottle? That is a dusky seaside sparrow. It was an old male that died on June 16, 1987. Its kind of sad because he was the very last dusky seaside sparrow in the world. Theyre now extinct. Yes, you have a question? Male: Do you know why they became extinct
39、? Tour Guide: Basically, they lost their habitat. See, the dusky seaside sparrow lived only in one placeon Merritt Island in Florida. The island had a lot of mosquitoes and wetlands. The people on Merritt Island used chemicals to kill the mosquitoes.,To be continued ,Listening 1,Tour Guide: Those ch
40、emicals were also very harmful to the sparrows, and many died. In addition, the people on Merritt Island tried to control and exploit the wetlands. As they altered them, the wetlands were no longer a good habitat for the sparrows. The birds died one by one until there werent any left. Female: So, if
41、 people were to blame, cant we make sure something like that never happens again? Tour Guide: Were trying. The situation with the dusky seaside sparrow makes one thing very clear. We need to protect endangered animals. However, its a better strategy to protect the animals and their habitats, too. Af
42、ter all, if an animals habitat is destroyed, the animal will likely become extinct.,To be continued ,Listening 1,Tour Guide: Were trying. The situation with the dusky seaside sparrow makes one thing very clear. We need to protect endangered animals. However, its a better strategy to protect the anim
43、als and their habitats, too. After all, if an animals habitat is destroyed, the animal will likely become extinct. Thats why the Endangered Species Act, which was passed in the United States in 1973, protects both endangered animals and their habitats. For example, the steelhead trout lives in river
44、s and streams on the west coast of the United Statesthe Columbia River in Washington state for instance. Recently, both the fish and the river came under the protection of the Endangered Species Act.,To be continued ,Listening 1,Male: But how can we protect large areas such as rivers and forests? No
45、 onenot even the governmentcan afford to buy or control all the land that endangered species live on. Tour Guide: Good point. In fact, thats what makes the Endangered Species Act difficult to fully enforce. Theres an ongoing conflict between some landowners and the government. Take the case of the g
46、ray wolf, for instance. At one time, the wolves were common all over North America, but by the 1930s they were nearly all killed. Then in 1973, the wolves came under the protection of the Endangered Species Act, along with huge areas of landin Wyoming and Idaho, for example. This angered ranchers. T
47、hey think they should have the right to shoot wolves that threaten their sheep and cows.,To be continued ,Listening 1,Tour Guide: So, landowners may understand the need for the protection of endangered species, but its understandable that they might also feel that the Endangered Species Act violates
48、 their rights. Yes? Female: Is the law working? I mean, what is the status of endangered species today in the United States? Tour Guide: Unfortunately, the situation of threatened and endangered animals is worse now than in 1973, even with the Endangered Species Act in place. Reports on topics such
49、as habitat loss, deforestation, and overfishing show that the situation for many species is far worse now than it was in 1973. Let me be more specific. Right now over 1,300 species in the United States are listed as endangered or threatened.,Listening 1,To be continued ,Tour Guide: And, its importan
50、t to keep in mind that not many species are ever taken off the list. Since 1973, in fact, only around 39 species have been removed from the Endangered Species list. But that number doesnt indicate the complete story. Whats significant about that number is that only 14 species were removed because th
51、ey had actually recovered. Nine species became extinct, and the others were removed from the list after scientists found evidence that listing the species had been a mistake in the first place. Meanwhile, another 300 species may soon be added to the list, including a plant, the Las Vegas buckwheat, and an insect, the Miami blue butterfly. So, you see, even with the Endangered Species Act in place, were not making as much progress as we would like. Any more questions? OK, lets move on to the next exhibit. This way, please.,
