高中英语M4-Chemical-or-Organic-Farming读写教学概要写作课件

高中英语M4ChemicalorOrganicFarming读写教学概要写作课件2023/6/9OrganicfoodsNon-organicfoodsnaturalchemicalfreeartificialusingchemicals(fertilizers/pesticides)traditionalconventional2023/6/9Read&ShareWhatcanwegetfromthepassage?Whichonedoestheauthorprefer?2023/6/9Overthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomethemasagreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.Para.12023/6/9Overthepasthalfcentury,usingchemicalfertilizershasbecomeverycommoninfarming.Manyfarmerswelcomethemasagreatwaytostopcropdiseaseandincreaseproduction.Recently,however,scientistshavebeenfindingthatlong-termuseofthesefertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.beneficialpositiveeffectsharmfulnegativeeffectshoweverPara.1

effects

of

chemical

fertilizerspositive&negativeTip1:Signalwords(likehowever,but,nevertheless)helpgetthekeyinformationquickly.stopcropdiseaseincreaseproductiondamagethelandandpeople’shealth2023/6/9Whataresomeoftheproblemscausedbychemicalfertilizers?First,theydamagethelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffectscropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.Manyofthesechemicalscanleadtocancerorotherillnesses.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoofasttobefullofmuchnutrition.Theymaylookbeautiful,butinsidethereisusuallymorewaterthanvitaminsandminerals.Para.22023/6/9Whataresomeoftheproblemscausedbychemicalfertilizers?First,theydamage

thelandbykillingthehelpfulbacteriaandpestsaswellastheharmfulones.Chemicalsalsostayinthegroundandundergroundwaterforalongtime.Thisaffects

cropsand,therefore,animalsandhumans,sincechemicalsgetinsidethecropsandcannotjustbewashedoff.Thesechemicalsinthefoodsupplybuildupinpeople’sbodiesovertime.Manyofthesechemicalscanleadtocancerorotherillnesses.Inaddition,fruit,vegetablesandotherfoodgrownwithchemicalfertilizersusuallygrowtoo

fasttobefullofmuchnutrition.

Theymaylookbeautiful,blemsFirst,alsoInaddition,Para.2

problemscausedbychemical

fertilizers---damagingtheland,crops,andhumansdamage

thelandaffectscrops,animalsandhumans,toofasttobefullofmuchnutrition.Tip2:Signalwords(likefirst,also,besides,inaddition)helplistmainpointsclearly.2023/6/9Withthesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeepingtheirsoilrichandfreeofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfreefromchemicals.Para.32023/6/9Withthesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeeping

their

soil

richandfree

ofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree

from

chemicals.Para.3advantagesoforganicfarmingkeepingthesoilrichandfreeofdiseasereducediseaseandhelpcropsgrowbettermakethesoilricherandmorefertilekeeptheair,soil,water,andcropsfreefromchemicals2023/6/9Withthesediscoveries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmingissimplyfarmingwithoutusinganychemicals.Theyfocusonkeeping

their

soil

richandfree

ofdisease.Ahealthysoilreducesdiseaseandhelpscropsgrowstrongandhealthy.Organicfarmers,therefore,oftenpreferusingnaturalwastefromanimalsasfertilizer.Theyfeelthatthismakesthesoilintheirfieldsricherinmineralsandsomorefertile.Thisalsokeepstheair,soil,waterandcropsfree

from

chemicals.Para.3advantagesoforganicfarming---keepingthesoilfertileandhealthykeepthesoilrichandfreeofdiseasereducediseaseandhelpcropsgrowbettermakethesoilricherandmorefertilekeeptheair,soil,water,andcropsfreefromchemicalsTip3:Sometimes,generalizingtherepeatedwordscanhelpsimplifythesummary.2023/6/9Organicfarmersalsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekindofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearperpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalsoplantcropstousedifferentlevelsofsoil,forexample,plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowfoodandavoiddamagingtheenvironmentorpeople’shealth.Para.42023/6/9Organicfarmersalsousemanyothermethodstokeepthesoilfertile.Theyoftenchangethekindofcropineachfieldeveryfewyears,forexample,growingcornorwheatandthenthenextyearperpeasorsoybeans.Cropssuchaspeasorsoybeansputimportantmineralsbackintothesoil,makingitreadyforcropssuchaswheatorcornthatneedrichandfertilesoil.Organicfarmersalso

plantcropstousedifferentlevelsofsoil,forexample,

plantingpeanutsthatusetheground’ssurfacefollowedbyvegetablesthatputdowndeeproots.Someorganicfarmerspreferplantinggrassbetweencropstopreventwindorwaterfromcarryingawaythesoil,andthenleavingitinthegroundtobecomeanaturalfertilizerforthenextyear’scrop.Thesemanydifferentorganicfarmingmethodshavethesamegoal:togrowfoodandavoiddamagingtheenvironmentorpeople’shealth.differentmethodsPara.4othermethodstokeepthesoilfertilechangethekindofcropeveryfewyearsplantcropstousedifferentlevelsofsoilplantgrassbetweencropsforexample,forexample,samegoalTip4:Whensummarizing,extrainformation(examples,details)canusuallybeignored.2023/6/9Para.1effectsofchemicalfertilizers(positivevsnegative)Para.4othermethodstokeepthesoilfertilePara.3advantagesoforganicfarmingPara.2problemscausedbychemicalfertilizersWhatWhyHowWiththesediscoveries,....Tosolvetheseproblems,farmersturnto…,because……alsousemanyothermethods...Apartfrom…therealsosomeothermethodslike...Tip4:Transitionalsentenceshelplinksentencesandparagraphstogethersmoothly.2023/6/9Summarytime!Writeasummaryofthispassagebasedonouranalysis.Trytoincludeallthepointsclearlyandconcisely.Attention!Whenwritingasummary,donotcopyfromthepassage!Instead,useyourownwords!2023/6/9HomeworkFinishyoursummaries.Sharewithyourpartnerandgiveeachothercomments.2023/6/9Tip1:Usedifferentsubjectstorestatethesentence.Tip2:Usedifferentsentencepatternstorestatethesentence.Tip3:Usedifferentverbformstorestatethesentence.Attention!Whenwritingasummary,donotcopyfromthepassage!Instead,useyourownwordstorestateit!Tip4:Usegeneralwordstosummarizethedetails.2023/6/9Summarywriting:

ChemicalorOrganicFarming?Althoughchemicalfarminghasitspositiveeffects,italsohasnegativeeffects.Despite

itspositiveadvantages,chemicalfarmingalsohasnegativeeffects.Scientistshavediscoveredthenegativeeffectsofchemicaleffectsdespiteitspositiveadvantages.Thenegativeeffectsofchemicaleffectscannotbeignoreddespiteitspositiveadvantages.Tip1:Usedifferentsubjectstorestatethesente