1、Unit 2 Saving the Earth Topic 3 What can we do at home to protect the environment?,Section C,Are you a greener person?,1a Read and understand. Look at the pictures. Do you know what they are? Choose the right picture for each paragraph.,paragraph 2,paragraph 3,Paragraph 4,1b Read 1a and match the wo
2、rds with the pictures on Page 48.,A. acid rain B. nuclear energy C. biogas,A,C,B,adj.原子核的， 原子能的,酸雨,Paragraph 2,Its key disadvantage is that the process requires a long time (up to 30 days )and the cost is high.它最大的缺陷是生产过程需要很长时间（长达30天）和成本高。,process n.步骤，过程 v.加工，处理,require v.需要，需求,require 有两种用法： *requ
3、ire (doing) sth. 表示主语“该.了”。 如： The floor requires washing. 地板该洗了。 *be required to do sth.表示主语必须（被要求）. 如:Students are required to attend classes. 学生必须按规定上课。,Paragraph 3,Electric vehicles were _ in the 1990s. On April 11, 2010, a new kind of electric vehicle _ “Yezi” was shown in the 2010 Shanghai Wor
4、ld Expo. It produces _ from the sun, the wind and CO2. It can not only protect the environment but also _ energy. Its too small to hold many people, but _ models will be developed in the near future.,develop, electric, name, save, large,developed,named,electricity,save,larger,Paragraph 4,1.去30公里以外的飞
5、机场只需花费人们七分钟的时间。,It takes people just 7 minutes to go to the airport 30 km away.,2.火车最高时速能够达到每小时431公里。,The train can reach a top speed of 431 km per hour.,1c Read 1a again and complete the table.,renewable,long process and high cost for its building,save energy,no pollution,too small to hold many peo
6、ple,quiet, quick, energy-efficient, no pollution,much more expensive than traditional steel railways,coal- dirty, acid nuclear energy - dangerous electric vehicles - the sun, the wind andCO2-protect the environment, save energy, small maglev train -German-built, quiet, quick, no wheel noise, energy-
7、efficient, not pollute the air biogas technology straw, grass and animal waste, everyday lives, require, the high cost,Retell 1a,German,n.德国人，德语,Germany n. 德国,pl. Germans,wheel n. 轮， 车轮， 轮子,E.g. They are Germans, and they are from Germany.,language points,2a Read the passage below and match the pict
8、ures with the sentences. Then discuss in detail the use of one energy source.,The sun, wind, waves and heat from deep in the earth are energy sources. They will never run out so they are called renewable sources. In 2011, about 16% of energy used worldwide came from renewable sources. The use of it
9、is increasing rapidly each year.,deep adj.深的，厚的 adv.深深地， 在深处,run out 用完，耗尽 E.g. He has run out of food, so his children are hungry.,2a Read the passage below and match the pictures with the sentences. Then discuss in detail the use of one energy source.,Wind can produce electricity in many places. P
10、eople use sunlight to produce electricity. Sea waves are used for producing electricity. People use hot water or steam from deep in the earth to produce electricity and heat for factories, schools and homes.,阳光，日光,水蒸汽，蒸汽，水汽,Sunlight can produce a lot of energy. People began to use the energy from th
11、e sunlight in different ways many years ago. We can use it to warm the house in the winter, to heat the water for baths, and to produce electricity. Whats more, we can even use it to run vehicles directly in the near future. As is known to us, the energy from the sunlight has a lot of advantages. Fo
12、r example, it is clean, renewable and non-polluting. Besides, it does no harm to our nature. So wed better use it as much as possible.,You can write it like this:,Homework,Read 1a. Memorize the useful expressions and key sentences which we learn today. Finish Section C in your workbook. Review Section A-C.,
