Unit5WorkingthelandUsingLanguage课件高中英语人教版选择性

Unit5WorkingtheLandUsingLanguage2EvaluatechemicalfarmingandorganicfarmingWelcometoJulie'sclass!__________artificialfertilizerschemicalpesticidesvs＄2perpounds＄5perpoundschemicalfarmingorganicfarmingQ:Whichkindoftomatowillyoubuy?Why?

nochemicalsanimalnaturalwasteWhatiscoveredinthefirstparagraph?Chemicalpesticidesandartificialfertilizershavebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.Overtime,however,whatsomescientistshavefoundisthattheirlong-termusecansometimesharmboththelandandpeople’shealth.

advantage

limitationhoweverdefinitionPredict:Whatmaybetalkedinthesecondparagraoh?Chemicalpesticidesandartificialfertilizershavebeeninwidespreaduseinfarmingsincethemiddleofthe20thcentury.Whentheywerefirstintroduced,manyfarmerswelcomedthemasagreatwaytofightcropdiseaseandincreaseproduction.Overtime,however,whatsomescientistshavefoundisthattheirlong-termusecansometimesharmboththelandandpeople’shealth.

Forexample,pesticidescandamagethelandbykillingnotonlyharmfulbacteriaandinsects,butalsohelpfulones.Inaddition,thesechemicalscanstayinthesoilandundergroundwatersourcesforalongtime.Thisaffectsthecropsgrownonthelandand,inturn,theanimalsandhumanswhodigestthem.Manypeopleworrythatthesechemicalsmaymakethemillandevencausecancer.Infact,somepesticideslikeDDThavebeenprohibitedinmostcountriesbecauseofthedamagetheycausetopeopleandtheenvironment.Asforchemicalfertilisers,cropsgrownwiththemusuallygrowtoofasttoberichinnutrition.Theymaylookbeautifulontheoutside,butinsidethereisusuallymorewaterthanessentialminerals,andtheyoftenhavelessflavouraswell.Checkthepredictiongeneralspecificdefinitionadvantage

limitationlangu-ageQ:Comparingpeople’sattitudetowardsthechemicalfarming,whatcanyoulearn?

quantityoffoodsafetyofcropqualityoffoodenvironment/healththefocusofagriculture:quantityoffoodsafetyofcropfarmingusingchemicalpesticidesandartificialfertiliserslanguagegivecleardefinitionhowever/but:contrastforexample:exampleinturn/also:explanationinfactinadditionasforchemicalfarmingdefinitionsolutionadvantage

limitationfightcropdiseaseincreaseproduction

harmboththelandandpeople’shealthpesti-cidesdamagethelandbykillingthewholebacteriaandinsects(direct)affecttheanimalsandhumans(indirect)chemicalfertiliserslessnutrition,essentialmineralsandflavourswitchtoorganicfarminglinkingwordsfocusBasedonthetitleandwhatwehavelearned,predictwhattherestofthepassagewillcover.ChemicalversusOrganicFarmingdefinitionadvantage

limitationfocus

Asanalternative,somefarmershaveswitchedtoorganicfarming,andmanycustomershaveturnedtoorganicfoodwhentheyshopatthelocalgrocery.Organicfarmingissimplyfarmingwithoutusinganychemicals.Organicfarmersfocusonkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans.Forexample,manyorganicfarmersusenaturalwastefromanimalsasfertiliser.Thismakesthesoilintheirfieldsricherinminerals.Italsokeepstheair,soil,water,andcropsfreeofchemicals.Organicfarmersalsousemanyothermethodstoproducerichsoil.Theyoftenchangethekindofcropgrownineachfieldeveryyear.Forinstance,theymaygrowcornorwheatinafieldoneyear,andthengrowbeanstherethenext.Whydifferentcropsaregrownisbecausetheyputimportantmineralsbackintotheground,makingitreadyforthenextbatchofcrops.Organicfarmersalsoplantdiversecropsthatusedifferentdepthsofsoiltohelpkeepitrich.Forexample,peanutsgrowontheground'ssurface,butmanyothervegetablesputdowndeeproots.Thegoalofusingdifferentorganicfarmingmethodsistogrowgoodfoodwhileavoidingdamagetotheenvironmentortopeople'shealth.Somepeoplewouldprefertostoptheuseofman-madechemicalsinagricultureentirely.Whatkeepsthemfromdoingsoisthefactthatchemicalfarmingservesthehighdemandforfoodaroundtheworld.Organicfarmingisnowherenearabletomeetthatneed.Therefore,thereisstillalongwaytofindasuitablesolutionthatputssufficientfoodonthedinnertablewhilekeepingpeopleandtheenvironmentashealthyaspossible.definitionfocus

limitationlangu-agemethodadvantageenvironment,healthsimplyfarmingwithoutusinganychemicalslanguagegivecleardefinitionforexample/forinstance:examplealso:furtherexplanationbut:contrasttherefore:linkingwordsorganicfarmingdefinitionsolutionadvantage

limitationkeepingtheirsoilrichandfreeofdiseasethroughnaturalmeans1.usenaturalwastefromanimalsasfertilizer2.changecropyearly3.plantdiversecropssoilricherinminerals;air,soil,water,andcropsfreeofchemicalsputimportantmineralsbackintothegroundnowherenearabletomeetthatneedkeepthesoilrichfindasuitablesolutionfocusdefinitionadvantage

limitationchemicalfarmingorganicfarmingfocusquantityoffood/safetyofcropenvironment,healthdefinitionfarmingusingchemicalpesticidesandartificialfertiliserssimplyfarmingwithoutusinganychemicalsadvantagefightcropdiseaseincreaseproductionlimitationnowherenearabletomeetthatneedsolutionswitchtoorganicfarmingfindasuitablesolution

definition,explanation,contrast,examples,linkingwords...writingtechniquedefinitionadvantage

limitationchemicalfarmingorganicfarmingfocusquantityoffood/safetyofcropenvironment,healthdefinitionfarmingusingchemicalpesticidesandartificialfertiliserssimplyfarmingwithoutusinganychemicalsadvantagefightcropdiseaseincreaseproductionlimitationnowherenearabletomeetthatneedsolutionswitchtoorganicfarmingfindasuitablesolution

definition,explanation,contrast,examples,linkingwords...writingtechniqueclear&coherentstructurecontentlanguageconvincinglogicalfocus:quantityoffoodsafetyofcroplimitation:

harmthelandharmpeople’shealthadvantage:fightcropdiseaseincreaseproductionlimitation:hardlymeettheneedfocus:environment,healthadvantage:keepingtheirsoilrichandfreeofdiseasethroughnaturalmeansorganicfarmingvschemicalfarmingDiscussion:Ifyouwerethefarmer,whatkindoffarmingwillyouchoose?alternative?Writing

Evaluatechemicalfarmingandorganicfarmingconvincing?!statetheopinionsupportingdetailsfocusadvantageconclusion

Inmyopinion,_______farmingispreferableto_________farmingbecause_____________________.point1:________________________________________moredetailspoint2:________________________________________moredetails......conclusionattention:

structurecontentlanguage

Writingtechnique:definition,explanation,contrast,examples,linkingwords...Reviseyourfirstdraftaccordingtothechecklistandpolishthelanguage.√Doesthewriterdoagoodjobofexpressinghis/heropinion?√Doesthewritermentionthefocusandadvantagesofthefarming?√Doeseachparagraphhaveatleastonedetailtosupportitsmainidea?√Doesthewritersequencethepointsinalogicalorder?√Doesthewriterdoagoodjobpersuadingyoutoaccepthis/heropinion?Shareandpolishfocus:quantityoffoodsafetyofcroplimitation:

harmthelandharmpeople’shealthadvantage:fightcropdiseaseincreaseproductionlimitation:hardlymeettheneedfocus:environment,healthadvantage:keepingtheirsoilrichandfreeofdiseasethroughnaturalmeansorganicfarmingvschemicalfarmingQuestionstothink:1.Whatwouldbethefocusoffuturefarming?2.Howcanweachievethesefocuses?futurefarmingalternative?limitation:hardlymeettheneedOrganicFarmingvsfocus:quantityoffoodsafetyofcroplimitation:

harmthelandharmpeople’shealthChemicalFarmingfocus:environment,healthadvantage:keepingtheirsoilrichandfreeofdiseasethroughnaturalmeansadvantage:fightcropdiseaseincreaseproduction03strengthenscientificandtechnologicalinnovationcultivateenvironmental

awareness添加标题promoteinternational

cooperation0102increasethemanagementandplanningofagriculturalproductionsustainabledevelopmentaCommunitywithaSharedFuture+themeAssignment

请写一篇文章阐述你对未来农业的看法。内容包括：1.未来农作方式及其关注点；2.为实现未来农业，我们应做的努力。

注意：1.词数80左右；2.可适当增加细节，以使行文连贯。opinionsupportingdetailsconclusion