advantages-and-disadvantages-of-GM-food.docx

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1、AdvantagesAndDisadvantagesofGeneticallyModifiedFoodsGeneticallymodifiedfoods(GMfoods)canbedefinedasorganismsinwhichthegeneticcodes(DNA)havebeenalteredusingnon-traditional,laboratory-basedmethodsthatdonotoccurnaturally.Thetechnologyisknownasgeneticengineering.Itallowsselectedindividualgenestobetransf

2、erredfromoneorganismintoanother,alsobetweennon-rclatcdspecies.GMfoodshavehadforeigngenes(genesfromotherplantsoranimals)insertedintotheirgeneticmaterial.CommonGMfoodsincludemaize,wheat,rice,soybeans,potatoes,pineapples.Sirawberries,cottonandsoon.GMfdsaredesignedforgreaterresistancetopestsandviruses,h

3、ighernutritionalvalueaereareM)methings(oremember:(I)Thebenetls,risksandethicalconcernsregardingGMfoodsarcstillbeingresearchedanddebated.(2)ThehealthrisksassociatedwithconsumingGMfoodsoringredientshavenotbeenunequivocallyestablished.(3)NocucntevidencesuggeststhatGMfoodsarcannfultohealth.(4)GMfoodsorI

4、bodscontainingGMingredientsarerequiredtobelabelled.GMfood:hopeordanger?Inrecentyears,somePeOPIChavebeenconductingaSUrVCywhichaimstofindifgeneticallymodifiedfoodisahopeordangertous.TbcresultisthatGMfoodownstotandobjectionfnpeople.OnIhConehand.somcpeoplearelkingforwardtobebenefitedfromthewidepromotion

5、ofGMfd.hcmainreasonithatGMfoodsgrowingissupposedtobehealthierthannormalfood.Foronething.GMfooddefendsthemselvesagainstpelsanddisease.WhiChmeansmuchlesspesticideusedingrowingseasons.Foranotherhing.GMPrOduCprovidebiggerharvests.OveralI.SUPPOrIerSofGMIbodargue(hatGMfoodshowadvantagesinqualityandquantit

6、y.Ontheolherhand.GMfmplants:soybean,comandcotonseedoil.ThefirstCiMiHncrciaIIygrowngeneticallymixliGedwholeRxxlcropwasttomato,whichwasmodifiedtoripenwithoutsoftening.Between1997and2009.IhC(OIalsurfaceareaofkindcultivaledWiIhGMOshadincreased,from4.2millionacresto331millionacres.By2006.intheUnitedStale

7、s89%ofsoybeans.83%ofcotton,and61%ofmaize(com)weregcnccicallymodified.AlthoughmostGMcropsaregrowninNorthAmerica,inrecentyears(herehasbeenrapidgrowthintheareasownindevelopingcountries.In2009thelargestincreaseincropareaplanted(oGMCnOPS(soybeans)wasinBrazilBy2(X)987%OflndiancottonwasGMMoreproductiveHndhavealargeryieldOiYcrmorenutritionalvalueandbetterflavorEliiiiinalealIergy-Causingpropertiesinsomefb