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1、Unit2WorkingthelandfertilizethesoiltoincreaseproductionofthecropsfertilizerfertilizerchemicalfertilizersnaturalfertilizerschemicalfarmingorganicfarmingchemicalfertilizersnaturalfertilizersBetter？ChemicalOrOrganicFarming?Recently,however,scientisthavebeenfindingt
2、hatlong-termuseofthechemicalfertilizerscancausedamagetothelandand,evenmoredangerous,topeople’shealth.Whataresomeoftheproblemscausedbychemicalfertilizers?Findoutandunderlinethetopicsentencesofeachparagraph.Para1.Para2.Step1TopicsentencePara3.Para4.Withthesediscov
3、eries,somefarmersandmanycustomersarebeginningtoturntoorganicfarming.Organicfarmersalsousemanyothermethodstokeepthesoilfertile.usinglanguage1Overthepasthalfcentury,__________(use)chemicalfertilizers______________(become)verycommoninfarming.2Recently,however,scien
4、tists______________(find)thatlong-termuseofthesefertilizerscan________________(对造成破坏）thelandand,evenmoredangeroustopeople’shealth.3Whataresomeoftheproblems____________(cause)bychemicalfertilizers?usinghasbecomecausedamagetohavebeenfindingcaused2.Whatproblemscanb
5、ecausedbyusingchemicalfertilizers?First,theycan_________thelandby_________thehelpfulbacteriaandpests.Theyalso________intheground,__________inpeople’sbodiesand________cancerorotherillnesses.Inaddition,itusuallygrowstoofasttobefullof____________.Paragraph2damageki
6、llingstaybuildupleadtonutrition1.Whatisorganicfarming?2.Whataretheadvantagesoforganicfarming?3.Whatarethemethodstokeepthesoilfertile?1.Organicfarmingisfarmingwithoutusinganychemicals.Haha,we'veturnedtoorganicfarming.Paragraph3&42.Whataretheadvantagesoforganicfar
7、ming?Thefarmers________keepingtheirsoilrich,________diseaseand_______theair,soil,waterandcrops_________chemicals.Paragraph3focusonreducingkeepingfreefromThemethodstokeepthesoilfertileusingnaturalwastefromanimalsasfertilizer.changingthekindofcropineachfield.plant
8、ingcropstousedifferentlevelsofsoil.plantinggrassbetweencropstoprevent…Thesamegoal:______________________________________________________________togrowgoodfoodandavoid
