九上U2T2SB (2)

1、Unit 2 Saving the EarthTopic 2 All these problems are very serious.sandstormNumber the pictures and then talk about them in groups. Do you know how sandstorms come into being? 415362 many treesIn the past, there were many trees.cut down treesBut now in order to make money or build houses , many peop

2、le cut down trees.forests goneSo the forests have gone.When it rains, the water washes the earth away.wash the earth awaychange into desert A lot of rich land has changed into desert.sandstorms come into beingAs a result ,sandstorms come into being.Number the pictures and then talk about them in gro

3、ups. Do you know how sandstorms come into being? 415362Listen to 1a, answer the questions.What are they talking about?What causes this kind of bad weather?They are talking about sandstorms.People have cut down too many trees. A lot of rich land has changed into desert.（录音（录音p35-1a）Read 1a, answer th

4、e question.What are trees functions?Trees can stop the wind from blowing the earth away.A lot of water can be saved by forests.Trees can also prevent the water from washing the earth away.A.B.C.Trees are important to us, what can we do to protect them? We should prevent people from 1.砍到砍到2.肥沃的土地肥沃的土

5、地3.变成变成4. 阻止阻止做某事做某事5.吹走吹走6.被被挽救挽救7.冲走冲走8.对对 有害有害9.人类人类10. 绿色长城绿色长城11.形成形成rich landstop (from) doing sth.prevent (from) doing sth.be saved bybe harmful to human beingsThe Great Green Wallkeep. from doing sth.cut downchange intoblow awaywash awaycome into being Protecting and Saving Water Water is ve

6、ry important to human beings, but not everybody knows how to protect and save it. Here are some ways:1. Pass laws against water pollution.2. Stop factories pouring waste water into rivers.3. Remember to turn the tap off when you leave.4. Collect and reuse waste water. .If we dont save water , the last drop of water will be a teardrop.The wind is blowing strongly with lots of sand.People have cut down too many trees.A lot of rich land has changed into desert.And a lot of water can be saved by forests.They ca