Unit 5 Working the Land Reading for Writing （ppt课件） -2022新人教版（2019）《高中英语》选择性必修第一册.pptx

1、chemical/conventional farmingorganic farming1.What is the text about?Chemical farming Organic farming picturestitle2.What type of writing is it?A.Narration(记叙文)B.Exposition(说明文)C.Argumentation(议论文)Match the main ideas(A-D)below with the paragraphs.ParagraphMain idea1-2345BCADA.What organic farming i

2、s B.Why man-made chemicals are still used in farming C.Organic methods for producing rich soil D.The problems with chemical farmingComplete the sentences in the tables.Para.Main IdeaDetail 1-2 Pesticides can kill helpful _Some pesticides have been _ because of the _Crops grown with chemical fertilis

3、ers usually _ to be full of _.bacteria and insects prohibiteddamage grow too fast nutritionD Para1 Chemical pesticides and artificial fertilisers have been in widespread use in farming since the middle of the 20th century.When they were first introduced,many farmers welcomed them as a great way to f

4、ight crop disease and increase production.Over time,however,what some scientists have found is that their long-term use can sometimes harm both the land and peoples health.pesticide n.杀虫剂in widespread use 在广泛使用中introduce v.推行；实施；采用over time 随着时间的流逝1.chemical pesticides2.artificial fertiliser3.be in

5、use in sth.4.long-term use5.over time6.organic farming1.化学农药2.人工肥料3.在.应用中4.长期使用5.随着时间推移6.有机耕种Para 1 phrasesPara2 For example,pesticides can damage the land by killing not only harmful bacteria and insects,but also helpful ones.In addition,these chemicals can stay in the soil and underground water so

6、urces for a long time.This affects the crops grown on the land and,in turn,the animals and humans who digest them.Many people worry that these chemicals may make them ill and even cause cancer.In fact,some pesticides like DDT have been prohibited in most countries because of the damage they cause to

7、 people and the environment.As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition.They may look beautiful on the outside,but inside there is usually more water than essential minerals,and they often have less flavour as well.bacteria n(单数bacterium）细菌in turn

8、相应地；转而；依次 digest vt vi 消化；vt 领会；领悟as for 至于 too.to.太.而不能.essential:adj.完全必要的；极其重要的1.damage the land2.harmful bacteria and insects3.underground water sources4.essential minerals5.in turn6.cause damage to sb.7.be rich in8.as well 9.as for1.破环土地2.有害的细菌和昆虫3.地下水资源4.必需矿物质，主要矿物5.相应地，依次，轮流6.对某人造成伤害7.富含.8.也9

9、.关于，至于Para 2 phrasesPara.Main IdeaDetail 3Many organic farmers use _ as fertiliser.natural wasteAPara3 As an alternative,some farmers have switched to organic farming,and many customers have turned to organic food when they shop at the local grocery.Organic farming is simply farming without using an

10、y chemicals.Organic farmers focus on keeping their soil rich and free of disease through natural means.For example,many organic farmers use natural waste from animals as fertiliser.This makes the soil in their fields richer in minerals.It also keeps the air,soil,water,and crops free of chemicals.alt

11、ernative n.可供选择的事物可供选择的事物switch to/turn to 转向，转变转向，转变grocery n.食品杂货店（食品杂货店（pl食品杂货）食品杂货）keep.free of/from 使使.免受免受.伤害（或影响等）伤害（或影响等）through natural means 通过天然的方法通过天然的方法1.switch to2.turn to3.local grocery4.keep their soil rich5.free of disease6.through natural means7.keep A free of B1.转向2.转向3.当地的百货店4.保持

12、土壤肥沃5.免受病害6.通过自然方法7.使A摆脱BPara 3 phrasesPara.Main IdeaDetail 4 They often _ grown in each field _.They also plant crops that use _ of the soil to help keep it rich.change crop every year different depths CPara4 Organic farmers also use many other methods to produce rich soil.They often change the kin

13、d of crop grown in each field every year.For instance,they may grow corn or wheat in a field one year,and then grow beans there the next.Why different crops are grown is because they put important minerals back into the ground,making it ready for the next batch of crops.Organic farmers also plant di

14、verse crops that used different depths of soil to help keep it rich.For example,peanuts grow on the grounds surface,but many other vegetables put down deep roots.The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.for

15、 instance/for example 例如，比如例如，比如depth n.向下（或向里）的距离；深度向下（或向里）的距离；深度put down roots 生根；定居生根；定居1.grow corn or wheat2.grow beans3.the next batch of crops4.plant diverse crops5.grounds surface6.avoid damage to1.种玉米或小麦2.种豆3.下一批谷物4.种植多样化的作物5.土地表面6.避免.的伤害Para 4 phrasesPara.Main IdeaDetail 5 Organic farming i

16、s nowhere near able to meet the high _.demand for food BReadingReadingPara5 Some people would prefer to stop the use of man-made chemicals in agriculture entirely.What keeps them from doing so is the fact that chemical farming serves the high demand for food around the world.Organic farming is nowhe

17、re near able to meet that need.Therefore,there is still a long way to find a suitable solution that puts sufficient food on the dinner table while keeping people and the environment as healthy as possible.entirely adv.全部地；完整地；完全地全部地；完整地；完全地serve vt 对对.有用，能满足有用，能满足.需要需要serve/meet/satisfy the demand for 满足对满足对.需要需要 nowhere near 远没有；远不及远没有；远不及 1.would prefer to do 2.man-made chemicals3.keep.from doing4.serves the high demand5.nowhere near6.meet the need7.there is still a long way to do8.sufficient food 1.宁愿做.2.人造化学品3.阻止.做某事4.满足高需求5.完全没有，远不及6.满足需求7.做某事还有很长的路要走8.充足的食物Para 5 phrases