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1、Unit 3Oxford EnglishModule 2 Environmental problemsPeriod 2Reading (II)Reading (II)The environment1Check-upSay something about the three main problems people face and their effects.The greenhouse effectCutting down forestsBad habits2While you readThe world is in dangerOur world is in danger. We must
2、 do something to protect the environment. But, what are the main problems we face?The greenhouse effectThe atmosphere around the Earth is necessary for all living things. It is like the glass of a greenhouse, letting sunlight in and keeping heat from getting out. Without it, the Earth would be the s
3、ame as the Mooncold and lifeless.When we burn fuels such as petrol and coal, we produce a gas called carbon dioxide (CO2). Too much of this gas pollutes the atmosphere, and causes it to keep in too much heat. As a result of the greenhouse effect, the Earths temperature is increasing. This causes sea
4、 level to rise, and in the future may cause cities to disappear.Read the first part of the text and put the sentences below in the right order.Read the first part of the text and put the sentences below in the right order.Cutting down forestsEvery year, we destroy nature by cutting down huge areas o
5、f forests. This makes the greenhouse effect worse because trees take in CO2 and produce oxygen. Cutting down trees also destroys the homes of the animals that live in our forests, and causes the surface of the soil to be easily destroyed by rain. This can result in floods and even more damage to the
6、 environment.Read the second part of the text and complete the diagram.Read the second part of the text and complete the diagram.We destroy nature by _We destroy nature by _._._becomes becomes worse.worse._._._._._take take place and_place and_ _ to to the the environment.environment. cutting cuttin
7、g down huge areas of forestsdown huge areas of forestsThe greenhouse The greenhouse effect effect The homes of the The homes of the animals that live animals that live in our forests are in our forests are destroyeddestroyedThe surface of The surface of the soil is easily the soil is easily destroye
8、d by destroyed by rain.rain.FloodsFloods even even more damage more damage is doneis doneCause Effect 1 Effect 2 Effect 3 Effect 4 Bad habitsMany of our habits cause pollution. People often use things once and then throw them away, or leave them on the ground as litter. This creates mountains of rub
9、bish and pollutes ourland and seas.Read the third part of the text and complete the diagram.Read the third part of the text and complete the diagram.People often _People often _, _, or _or _._._._._._.This creates This creates mountains of mountains of rubbishrubbishThis pollutes our This pollutes o
10、ur land and seasland and seas use things once use things once and then throw them awayand then throw them away leave them on the ground leave them on the ground as litteras litterCauseEffect 1Effect 2In order to protect the environment, we need to take proper action. We should be different from many
11、consumers and become “green consumers”. This means that we should only buy and use productsfriendly to the environment. We should also recycle asmany things as we can. We can reuse things forthe same purpose as before, or we can use them for new purposes. If we just learn to live in new and differen
12、t ways, we can make a difference.Read the last part of the text and fill in the table.Topic sentenceTopic sentenceTheThe w writers riters suggestionssuggestionsConclusionConclusionIn order to protect the In order to protect the environment, we need to take environment, we need to take proper action.
13、proper action.“green “green consumers”consumers”make a difference make a difference Read the last part of the text and fill in the table. buy and use products buy and use products friendly to the environmentfriendly to the environmentrecycle as many things recycle as many things reuse things for the
14、 reuse things for the same purpose as beforesame purpose as before use use things for new purposesthings for new purposes3Vocabulary C2 Complete the conversation below with the words from the box. Change their forms if necessary.4D1 Replace the italicized words with information from the article on p
15、age 35. ComprehensionD2 Read the article again and circle the correct answers.D3 The writer gives an example of a bad habit that causes pollution. Can you name some other bad habits that cause pollution?.Discuss and answerHHomework 1. 抄写单词和短语： lifeless，fuel，coal，destroy，nature，soil，flood，friendly，recycle，purpose；result in，make a difference。 2. 整理Comprehension D3的讨论内容，准备在下节课作口头汇报。3. 完成练习册第34页Vocabulary和第42至43页Reading B，C的练习。
