chemical-or-organic-farming--有机还是化学种植

ChemicalOrOrganicFarming?ReadingWhatisthesubstanceweputonthesoilwhichmakescropsgrow?Itisfertilizer.Howmanykindsoffertilizersdofarmersuse?Therearetwokinds.Theyarechemicalfertilizersandnaturalones.Task1Skimming（3mins）Findoutthemainideaofthesefourparagraphs.Long-termuseofchemicalfertilizerscancausedamagetothelandandpeople’shealth.Problemscausedbychemicalfertilizers.P1.P2.Farmersandcustomersturntoorganicfarming.Othermethodstokeepthesoilfertile.P3.P4.chemicalfertilizersWhyarechemicalfertilizerssopopularinfarmingtoday?Manyfarmerswelcomedthemasagreatwaytostopcropdiseaseandincreaseproduction.Paragraph1Tips:theusageofseveraladverbsmeansclearandreasonableconnectionbetweenparts.Task1Scanning合成肥料Whatproblemscanbecausedbyusingchemicalfertilizers?Therearethreeproblems.First,theycandamage…aswellas….Theyalsostayinthe…and….Inaddition,…growtoofastto….Tips:connectives（过渡词）andtransitionalphrases（过渡词）fordevelopmentfirst;second;finally;lastbutnotleast,etc.1.Whatisorganicfarming?2.Whataretheadvantagesoforganicfarming?1.Organicfarmingmeansgrowingcropswithoutusinganychemicals.Haha,we'veturnedtoorganicfarming.Paragraph32.Whataretheadvantagesoforganicfarming?Thefarmersfocusonkeepingtheirsoilrichandfreeofdiseaseandkeepingtheair,soil,waterandcropsfreefromchemicals.Paragraph3Themethodstokeepthesoilfertileusingnaturalwastefromanimalsasfertilizer.changingthekindofcropineachfield.plantingcropstousedifferentlevelsofsoil.plantinggrassbetweencropstoprevent…Thesamegoal:____________________________________________________________________________________________togrowgoodfoodandtoavoiddamagingtheenvironmentorpeople’shealth.Paragraph3and41234•Focuson;leadto;problem;keep…freefrom;method;organic;chemical;causedamageto;buildup;discovery•Inrecentdays,scientistshavediscoveredthatusingchemicalfertilizersforalongtimecan_________________thelandandalsopeople'shealth.Thereareseveral__________causedbychemicalfertilizers.Theydamagetheland,stayinthewaterforalongtimewhichcan___________inpeople’sFillintheblanksaccordingtothepassage.•Focuson;leadto;problem;keep…freefrom;method;organic;chemical;causedamageto;buildup;discovery•bodiesand____________manyillnesses.Withthese___________,________farmingisbecomingmorepopularwithsomefarmers.Theydon’tuseanychemicalsand_________keepingthesoilrich.Thisalso__________theairandcrops___________chemicals.Therearemanyorganicfarming_________formakingthelandhealthyandproductive.Allofthesemethodstrytoproducegoodfoodandtokeeptheenvironmentandpeople’shealth.•MakeadialogueNowadaysorganicfoodisbecomepopularamongcustomers.Haveaconversationinpairs,withoneasthefarmerwhointendstosellorganicfruitandvegetablesandtheotherasthecustomer.Thefarmerispersuadingthecustomertobuyhisorhergreenfood.Practice•Youneedto...It'sapitythat...•I'dprefer....because...It'sbetterto...•Thisisgoodvaluebecause...•What'stheadvantageof...?•IfIhaveachoiceI'llchoose...•It'sagreatpitythat...•Theadvantagesare...•It'smoreexpensivebut...Homework•Readthepassagemorecarefullyafterclass,andfindsomeusefullanguagepoints.•Finishtheexercisesonexercisesbook.