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1、Unit1WillFrankenfoodFeedTheWorld?一、.Ifyouwanttosparkaheateddebateatadinnerparty,bringupthetopicofgeneticallymodifiedfoods.Formanypeople,theconceptofgeneticallyaltered,high-techcropproductionraisesallkindsofenvironmental,health,safetyandethicalquestions.Parti
2、cularlyincountrieswithlongagrariantraditions—andvocalgreenlobbies—theideaseemsagainstnature.2.Infact,geneticallymodifiedfoodsarealreadyverymuchapartofourlives.AthirdofthecornandmorethanhalfthesoybeansandcottongrownintheU.S.lastyearweretheproductofbiotechnolo
3、gy,accordingtotheDepartmentofAgriculture.Morethan65millionacresofgeneticallymodifiedcropswillbeplantedintheU.S.thisyear.Thegeneticgenieisoutofthebottle.3.Yetthereareclearlysomeveryrealissuesthatneedtoberesolved.Likeanynewproductenteringthefoodchain,genetical
4、lymodifiedfoodsmustbesubjectedtorigoroustesting.Inwealthycountries,thedebateaboutbiotechistemperedbythefactthatwehavearicharrayoffoodstochoosefrom—andasupplythatfarexceedsourneeds.Indevelopingcountriesdesperatetofeedfast-growingandunderfedpopulations,theissu
5、eissimplerandmuchmoreurgent:Dothebenefitsofbiotechoutweightherisks?4.Thestatisticsonpopulationgrowthandhungeraredisturbing.Lastyeartheworld'spopulationreached6billion.Andby2050,theU.N.estimates,itwillprobablynear9billion.Almostallthatgrowthwilloccurindevelop
6、ingcountries.Atthesametime,theworld'savailablecultivablelandperpersonisdeclining.Arablelandhasdeclinedsteadilysince1960andwilldecreasebyhalfoverthenext50years,accordingtotheInternationalServicefortheAcquisitionofAgri-BiotechApplications(ISAAA).5.TheU.N.estim
7、atesthatnearly800millionpeoplearoundtheworldareundernourished.Theeffectsaredevastating.About400millionwomenofchildbearingageareirondeficient,whichmeanstheirbabiesareexposedtovariousbirthdefects.Asmanyas100millionchildrensufferfromvitaminAdeficiency,aleadingc
8、auseofblindness.Tensofmillionsofpeoplesufferfromothermajorailmentsandnutritionaldeficienciescausedbylackoffood.6.Howcanbiotechhelp?Biotechnologistshavedevelopedgeneticallymodifiedricethatisforti
