Unit5 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、Reading for WritingChemical Versus Organic Farming与相对It is fertilizer.What is the substance we put on the soil to make crops grow?Pre-readingWhat kind of fertilizers do farmers use?chemical fertilizers natural fertilizersorganic farmingchemical farmingorganic farmingorganic farmingchemical farmingor

2、ganic farmingA.What organic farming is B.Why man-made chemical are still used in farming C.Organic methods for producing rich soilD.The problems with chemical farming Para.1-2 Para.3 Para.4 Para.5 Read the text and then Match the main idea with each paragraph.Chemical farmingOrganicfarmingThinkingPa

3、ra 1 CHEMICAL VERSUS ORGANIC FARMING Chemical pesticides农药 and artificial fertilisers肥料 have been in widespread wadspred广泛 use in farming since the middle of the 20th century.When they were first introduced,many farmers welcomed them as a great way to fight crop disease and increase production.Over

4、time,however,what some scientists have found is that their long-term use can sometimes harm both the land and peoples health.自20世纪中期以来，化学农药和人工肥料已在农业中广泛使用。当它们第一次被引进时，许多农民都欢迎它们，作为防治农作物病虫害和提高产量的好方法。然而，随着时间的推移，一些科学家发现，长期使用它们有时会损害土地和人的健康。Para 2_1 For example,pesticides can damage the land by killing not

5、only harmful bacteria and insects,but also helpful ones.In addition,these chemicals can stay in the soil and underground water sources for a long time.This affects the crops grown on the land and,in turn进而,the animals and humans who digest dadest消化 them.Many people worry that these chemicals may mak

6、e them ill and even cause cancer.例如，杀虫剂不仅能杀死有害的细菌和昆虫，还能杀死有益的细菌和昆虫，从而破坏土地。此外，这些化学物质可以在土壤和地下水源中停留很长时间。这影响了土地上生长的作物，进而影响了消化这些作物的动物和人类。很多人担心这些化学物质可能使他们生病，甚至导致癌症。Para 2affect The results of the exam will affect everyone.People tend to think that education will affect our future.That you care too much abo

7、ut money will affect your frienship between you and him.Para 2 In fact,some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment.As for chemical fertilisers,crops grown with them usually grow too fast to be rich in nutrition njutrn

8、营养.They may look beautiful on the outside,but inside there is usually more water than essential senl必需的 minerals mnrlz矿物质,and they often have less flavour as well口感较差.事实上，像滴滴涕这样的杀虫剂在大多数国家都是被禁止使用的，因为它们对人类和环境造成损害。至于化肥，用它们种植的作物通常生长得太快，导致营养不足。它们的外表可能看起来很漂亮，但里面的水分通常比必需矿物质多，而且它们的口感较差。Para 2as forAs for me

9、,let me tell you,I hate to study!So as for your question,the answer still has to be no.As for eating and drinking on the subway,different people have different opinions.Para 3 As an alternative ltntv替代选择,some farmers have switched to organic farming,and many customers have turned to organic food whe

10、n they shop at the local grocery rsri杂货店.Organic farming is simply farming without using any chemicals.Organic farmers focus on注重 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 the

11、ir fields richer in minerals.It also keeps the air,soil,water,and crops free of chemicals.作为一种替代选择，一些农民转向了有机农业，许多顾客在当地杂货店购物时转向了有机食品。有机农业就是不使用任何化学物质的农业。有机农民注重通过自然手段保持土壤肥沃和无病害。例如，许多有机农民使用动物的天然排泄物作为肥料。这使得他们田地里的土壤富含矿物质。它还使空气、土壤、水和作物不受化学物质的影响。Para 3focus onYou should always focus on quality,not quantity

12、of your homework.We should focus on finding effective methods ofstudying English.Our school focuses on Quality Education.Para 3free ofIf this could be fulfilled,my life would be free of care.In fact the park is free of charge at the weekend.It was several weeks before he was completely free of pain.

13、Para 4_1 Organic farmers also use many other methods to produce rich soil.They often change the kind of crop grown in each field every year.For instance nstns例子,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 import

14、ant minerals back into the ground,making it ready for the next batch批 of crops.有机农民还使用许多其他方法来维持土壤肥沃。他们经常每年更换每块地里种植的作物种类。例如，他们可能今年在一块地里种玉米或小麦，然后第二年在那里种豆类。种植不同农作物的原因，是为了把重要的矿物质返回地里，为下一批作物（的种植）做好准备。Para 4Organic farmers also plant diverse crops that use different depths dps 深度 of soil to help keep it r

15、ich.For example,peanuts grow on the grounds surface,but many other vegetables put down deep roots ruts.The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.有机耕作的农民还种植各种不同的农作物，他们对土壤有不同的深度要求，来保持土壤肥沃。例如，花生生长在地表，但许多其他蔬菜都深深

16、扎根于土壤深处。使用不同的有机耕作方法的目标，是种植优质粮食作物，同时避免对环境或人们的健康造成损害。Para 4whileHe likes to listen to music while doing his homework.My mother was reading books while cooking.He was reading books while waiting for the bus.While doing experiments实验,you must make careful observations观察.Para 5 Some people would prefer t

17、o stop the use of man-made chemicals in agriculture entirely ntali完全地.What keeps them from doing so is the fact that chemical farming serves满足 the high demand要求 for food around the world.Organic farming is nowhere near远远不 able to meet满足 that need.Therefore,there is still a long way to find a suitabl

18、e solution that puts sufficient（plenty=engough）food on the dinner table餐桌 while keeping people and the environment as healthy as possible.有些人宁愿彻底停止在农业中使用人工化学品。他们不能如愿的原因是，化学农业满足了世界各地对食物的高需求。有机农业远远不能满足这种需求。因此，要找到一个合适的解决方案，在餐桌上提供充足的食物，同时尽可能保持人类和环境的健康，还有很长的路要走。organization Title Text type:Exposition The

19、 _ and _ of chemical farming.benefitsproblemsPart 1:(Para 1&2)What organic farming is and _.how it keep the soil richPart 2:(Para 3&4)Part 3:(Para 5)Conclusion however,but,on the contrary,instead,on one hand on the other hand for example,for instance,in fact,such as,take for example bothand,not only

20、but also,in addition,and,also,as well,whats more,besides,furthermore,moreover,whats worsewhyis because,therefore,for this reason,thus,consequently,as a ressultas for,as an alternativediscourse markers contrast illustrate add cause and effectintroduce a new topic(Para.1-2)chemical farmingAdvantages D

21、isadvantages 1.2.u harming the :killing harmful _ as well as _ staying in the _ and _ for a long time.u harming _:These chemicals may make people _and even_u harming the _ Crops grow too fast to be _.bacteria and insectsthe helpful onesillrich in nutritioncause cancerfight crop diseaseincrease produ

22、ctionwater sourceslandcropspeoples healthsoilundergroundAs an alternative,Id like to switch to organic farming!What is organic farming and how is it different from chemical farming?Organic farming is simply farming without using any chemicals.Organic farmers focus on keeping their soil rich and free

23、 of disease through natural means.What are the organic methods mentioned in the text?(Para3&4)1.use natural waste from animals as fertilizer.2.change the kind of crop grown in each field every year.3.plant diverse crops that use different depth of soiluse natural waste from animals as fertilizerchan

24、ge the kind of crop grown in each field every year.to put important minerals back into the ground to make the soil in the fields richer in mineralsplant diverse crops that use different depth of soil.to keep the soil richMethods Purposes Whats the goal of using different organic farming methods?（Par

25、a.4）The goal of using different organic farming methods is to grow good food while avoiding damage to the environment or to peoples health.Why cant we stop the use of man-made chemicals in agriculture entirely?A.Organic farming cost us a lot of money.B.Organic farming can meet peoples need.C.Chemica

26、l farming brought us huge profit.D.Chemical farming helps serve the need for food.（Para.5）paragraphmain ideadetail1-2DPesticides can kill helpful_Some pesticides have been_because of the _Crops grown with chemical fertilisers usually _ to be full of_3AMany organic farmers use _ as fertiliser.bacteri

27、a and insectsnutritionnatural waste from animalsprohibitedthe demage they cause to people and environment grow too fast4CThey often _ grown in each field _They also plant crops that use _ of the soil to help keep it rich.5BOrganic farming is now nowhere near able to meet high_change the kind of crop

28、to produce rich soildiverse depthdemand for food语法填空 Given the fact that chemical pesticides and artificial fertilisers can fight crop disease and increase production,they 1 _(be)in widespread use since the 1950s.However,with time going by,they have been proved 2 _(harm)to the environment and human

29、health if 3 _(use)for a long time.To tackle the problems,farmers have switched to organic farming 4 _an alternative.And organic food has become 5 _favorite for many customers.have beenharmfulusedasa语法填空Organic farmers rely on it that natural means could keep their soil fertile and free of disease.Di

30、fferent organic methods have come up,6 _goal is to grow good food while avoiding damage to the environment or to the human health.7 _,organic farming cannot replace chemical farming with a huge number of people 8 _(feed)worldwide.There is still a long way to go 9 _scientists find a suitable 10_(solve)that can satisfy the high demand for food while protecting the environment.whoseHoweverto feedbeforesolutionWritingTopic sentence:In my opinion,_farming is preferableto _ farming because_.Point 1:_ Detail:_Point 2:_ Detail:_Point 3:_ Detail:_Conclusion:_ chemical farming VS organic farming