贵州省贵阳市花溪二中八年级英语下册《Unit 4 Lesson 1》课件3 人教新目标版

1、Lesson OnePopulation Problems,Where do we live?,Is it beautiful? Do you love it? What do people always call it instead of the earth? If she has problems, would you like to help her?,The world is faced with many problems. Governments should solve:,population growth,The problem of overcrowding in many

2、 cities,the aging problems,in Africa,in Asia,in Europe,Future Problems,Read the first paragraph and fill in the blanks. The world population is _ very _. In the last 40 years, the world population has _. By the year 2200, it will be about _ billion. Our cities will be much _. There will be more _ an

3、d more _. We will need more _ and other _. Therefore, we will have _ in the future, so we must change the way we use _ and natural _now.,bigger,factories,roads,water,serious problems,growing,fast,doubled,10,natural resources,energy,resources,second paragraph Listen and fill in the missing words.,_ o

4、f this is paper that we can use again. _ average family in Europe or America throws away over _ ton of rubbish _ year, but we can recycle _ of it. If we recycle things, we can save_, _ and _.,Half,An,one,each,much,reuse,more than,money,energy,resources,third paragraphListen and then answer the quest

5、ions:,a. What will exist (存在) for hundreds of years? b. What pollutes the air, the land and the water? c. What can we do to reduce (减少) pollution?,Plastics and chemicals,We must stop using materials like plastics and chemicals.,not disappear,Plastics and chemicals,fourth paragraphFill in the blanks

6、using the words in the brown.,the ways to, used up , available, less, fewer Coal and minerals, for example, will be _ some day. Other resources take a long time to grow, such as trees, or they may not always be_, such as water. We must learn to use _ energy and _ resources. We also have to find othe

7、r ways to make energy. We can find _ use the sun, the wind and the sea.,used up,fewer,less,available,the ways to,produce,useable,Fast population growth,Change the way we use energy and natural resources,Waste things we can use again,Recycle,A lot of rubbish cannot be recycled,Pollute the air, the la

8、nd and the water,Will be used up some day or may not always be available,Use less energy and resources or find other ways to make energy,Pair Work: Read the material and complete the table:,Group Discussion,Form a group of four and discuss the main idea of each paragraph.,You may find it helpful to

9、use the first and last sentences of each group.,Hint,the main idea of each paragraph,1 2 3 4,A. Plastics and chemicals cannot be reused. Instead, they pollute the air, the land and the sea, so we must stop using them. B. Because the world population is growing, we will face serious problems. So, we must find out solutions. C. Many of the natural resources cannot be renewed, so we must find new ways to make energy. D. People throw away millions of tons of rubbish every year, but we can use much of it