高中英语 Unit 7 The sea Lesson 26 Protecting the Sea课件 北师大版必修3.ppt

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1、Unit 7 The Sea26 Protecting the SeaHow is the sea important to people?People can get sea food such as: fish , sea animals and plants; The sea is rich in many natural resources. we can get oil, natural gas and some metals, besides, the sea has a great effect on climate on the earth.Japanese ship are

2、killing the whale .How cruel they are!The sea is important to us. But with the development of society, human beings explore and seize the sea without limit, as a result, do harm to the sea.Harvest fish now ,What about the future?What happened?The oil tanker was upset, oil poured into the sea.What is

3、 the result? In 1989 an oil tanker hit a rock off the northwest coast of Alaska. 35,000 tons of oil poured into the sea. The accident was one of the worst in history. More than 34,000 birds and 10.000 animals were killed. 4,8oo square kilometers of ocean were polluted.The Sea is weepingWhat will hap

4、pen?Is there nothing with us? China has been experiencing increasing red tides off the Chinese coast since the 1990s due to increasing pollution caused by industrial waste. According to an official report, during the past 20 years , a total of 200 red tides have been registered（经正式鉴定的）（经正式鉴定的）causin

5、g 240 million U.S. dollars in direct economic losses. The 45 major red tides occurred in the Bohai Sea, the Yellow Sea, the EastChina Sea and the South China Sea. About 4 billion tons of industrial waste water are discharged(排放排放) into the sea every year , resulting in the accumulation（积累）（积累）of org

6、anic pollutants blamed（归咎于有机污染物）（归咎于有机污染物） for the growing outbreaks of disastrous red tides. Red tides may also destroy marine lives（海（海洋生物）洋生物） and bring harm to marine cultivation industries(海洋养殖业海洋养殖业).1. You are likely to notice something about sea pollution in your city or hometown, please tal

7、k about it . 2. If we go on polluting the sea what is the result? If the government go on allowing the industrial waste from factories into the sea and rivers, it is not safe to eat the fish. If we go on pouring the rubbish into the sea, it is no longer safe for swimming, as a lot of diseases are pr

8、esent in the water. If we go on polluting the sea like that , children in the future will not see beautiful blue sea.3.What measures do you think we should take?The government should make laws to protect the sea. We take action like them to protect the sea. cleaning oilThe people of the Green Peace

9、Organization are struggling with the ship for catching whales.What are they doing?Zhi Hong and Fang Zhou are also talking about protecting the sea . What will they say?We should spread the knowledge about protecting the sea and let people realize the importance of the sea.Listen to the tape and choo

10、se the right answer. 1. What can be done about over fishing? man-made raising fish B. In the worst areas they ban fishing for several yearsC. control the number of fish people can catch C. control the number of fish people cancatch2. Whats the result of over fishing?A. there are less fish to catch B

11、. people can fish too muchC. They can catch more fish than before by better technologyA. there are less fish to catch 3. What are some government departments doing about sea pollution?A. punishing people who keep a record of levels of populationB. thinking of ways to reduce populationC. all departme

12、nts must be responsible for finding where pollution comes from B. thinking of ways to reduce populationListen to the tape again and fill in the tape.1.Thats when people fish _and the number of fish_. Some fish may disappear altogether.2.So there are more fisherman _? Well, they hope to_, but there a

13、re _to catch, so they_.too muchfalls too lowcatching more fishcatch more fishless fishsimply cant3. It mostly comes from _waste from_ and _ waste from_.4. They also try to help people to _, so there are _trying to_.less peoplemaking a living from fishingindustrialagriculturalfactoriesfarmingget othe

14、r kinds of jobs2. What is the problem 2?pollutionOver-fishingListen to the interview again and answer the questions1.What is the problem 1?3.What are the reasons for problem 2? too many fisherman in the same place, better technology can catch more fish.4. What are the causes of problem1?chemicals ,

15、plastic, rubbish, oil, industry waste, from factories and agricultural waste.5. What are the solutions to problem 1? government departments, look for ways to reduce pollution , keep a record of levels of pollution, finding where it come from, punishing polluters who break the law.6. What are the sol

16、utions to problem 2? Control the number of fish that people can catch ,ban fishing completely for a few months, help people to get other kinds of jobs. Read through the example dialogue then make up a new one with your partner.A: What are you going to do for your sea project?B: Im interested in hist

17、ory of sea travel.A: Oh, really?B: Yes. I want to know how human beings crossed the sea to land other places in small boat.A: Oh! It is hard to imagine .B: Mm. They were brave and clever enough to explore unknown land.A: What do you already know about the subject?B: I know it wasnt Columbus but the

18、Viking reached America first.A: Oh, were they?B: Yes, look at the old map. It is thought that the Viking draw the map that was used by Columbus later.A: Mm. It is too interesting. What do you need to find out about the subject?B: Who were the first people to reach Australia? How did they arrive?A: R

19、eally? How can you find out more about the subject?B: I get some information from books and the Internet. Ill make a cartoon about it.A: Mm, do you really? Thats sounds wonderful!Homework:WritingPractise using the useful words about protecting the sea by making sentences with them:protect, pollute, pollution, waste, deal with, be responsible for, break the law, punish, keep a record of , control, communicate.THANKS AND BYE!