Food and health(食物与健康)ppt课件

.,FoodandHealth,UnitTwo,.,1.Warm-upActivity,Readthefollowingquoteabouthealthyeating.Trytoexplainitwithexamplesoryourpersonalexperiences.Theonlywaytokeepyourhealthistoeatwhatyouvdontwant,drinkwhatyoudontlike,anddowhatyoudrathernot.,.,2.ListeningandSpeakingText1.Geneticallymodifiedfood,QandA1.WhatdoyouknowaboutGMfood?2.WhatdoyouthinkofthepurposeofproducingGMfood?3.DoyoumindeatingGMfoood?Doyouthinkitmightdobadtoyourhealth?,.,geneticallymodifiedfood转基因食品readuponthesubject研究这个课题Dontbedaft.别傻了！havemyfoodaltered食物被改变hepatitisBvaccines乙肝疫苗playaroundwith.摆弄playhavocwith扰乱Whenaspeciesdiesoutormutates,ithasaknock-oneffectonthewholeecosystem.党某一物种灭绝或者发生基因突变，它会对整个生态系统产生连锁反应。cynical愤世嫉俗的thehabitatofpolarbears北极熊的栖息地comearoundtomywayofthinking改变思维方式aguineapig试验品（小白鼠）,.,Referenceanswers,EX1.TFFFTFEX2.safertightercontrolsvegetablesextictdecreasinginnumberspoorcountrieswholeecosystem,.,Classdebate:IsGMFoodBeneficial,Argumentsfor:TherehavebeenagreatnumberofstudiestrackingtheeffectsofGMfoodonanimals.ThesestudiesindicatethatGMfoodissafetoconsumeFarmerswhogrowGMcropsusefewerenviornmentallydamagingpesticides.GMcropscanhavelargeryields.TheincreasingyieldsofGMcropsareessentialtofeedingtheworldsgrowingpopulation.GMfoodcanwithstandcolderweather,droughts,andfloodsArgumentsagainst:GMcropshaveledtoanincreaseinherbricide-and-pesticide-resistantweedsandinsects.Thereisnoscientificconsensusonthelong-termsafetyofGMfood.Introducingageneintoaplantmaycauseunexpectedallergicreactionstopeople.SomeGMfoodshaveantibioticfeaturesbuiltintothem.Peoplewhoconsumethesefoodsmaybecomeresistanttoantibioticdrugs.,.,Text2.Truthaboutorganicfoodlabels,Thedifferentorganicfoodlabels:Natural:anythingbutorganicContainsorganicingredients:lessthan70%Madewithorganicingredients:atleast70%Organic:atleast95%100%organicTheorganiclabelingomeatanddairyproducts:Grassfed:outdoorsandanaturaldietofgrassFreerange:outdoorsNohormonesadded,.,Referenceanswersfor,organiclessthanatleast95%100%theoutdoorsnaturaldietbeingkeptinsmallcagesbeingraised,.,Groupwork,Describethechartbrieflyandgivecommentsonyourownclaims(refertotheusefulexpressionsonP.21),.,Text3.Meatornot-Fourtypesofvegetarians,Workingroupsonthefollowingquestions:Canyoulivewithoutmeat?Doyouknowanypersonwhodoesntlikeeatingmeat?Haveyoueveraskedthemaboutthereasons?Whydomorepeoplechoosetobecomevegetariansnow?Whatcanpeoplebenefitfromavegetariandiet?Whatarethehealthrisksinbecomingavegetarian?Doyouwanttobeavegetarian?Whyorwhynot?Groupreportfortheanswersofthesequestionsinashortpassage.,.,alacto-ovovegetarian:plantfood+diaryproducts+eggsdiaryeggsalactovegetarian:plantfood+diaryproductsanovovegetarian:plantfood+eggsavegan:plantfoodonly,.,Referenceanswers,EX1.EX2.milk,cheese,yoghurtmarinesourcelikemarinealgae,fishoilsupplementdeatmeatEX.3homework,.,3.ViewingandSpeaking,Listsomeprocessedfoodswhichyoulikebutmaydoharmtoyourhealthifyoueattoomuchofthem.Andtelluswhyyoulikethem?Canwecompletelyavoidprocessedfoodsinourdailylife?Ifnot,whatmeasurescanwetaketomaintainacomparativelyhealthydiet?LearnthenewwordsandexpressionsonP.24.,.,Referenceanswers,1.theirnaturalstate,man-madeingredientsshelflife,hydrogen,uptoahalfgram,thesameas,lookold2.bad,good,plastic,cells,communicateortalk,cancer,packagedfoods,fat,desiremore,highbloodtressure