2019-2020年高中英语 Unit 3 Tomorrow’s World Finding foods for the future教案 牛津译林版必修4

2019-2020年高中英语 Unit 3 Tomorrow’s World Finding foods for the future教案 牛津译林版必修4随着世界人口增长和气候变化，人类在未来可能会

2019-2020年高中英语Unit3Tomorrow’sWorldFindingfoods forthefuture教案牛津译林版必修4 随着世界人口增长和气候变化，人类在未来可能会面临食物短缺的问题。目前，许多科 学家和研究人员正在与时间赛跑，试图找到好的解决办法。 Peopleneedtofindoutnewfoodsbecausetheworldhassomanymouthsto feed.Asofxx,therearemorethansevenbillionpeopleonEarth,accordingto theUnitedNations.Andby2100thatnumbermaydouble,accordingtosome predictions (预测).Feedingallofthesepeoplemeansnotonlyimprovingtheway foodisgrown,butalsofindingnewsourcesoffoods.Andthatneedisbeing appetite evermoreurgent.Ifnothingchanges,within35years,theworld’s(胃 口)willbegreaterthantheamountoffoodproduced.That’saccordingtoa reportreleasedlastyear.ItwaspreparedbytheGlobalHarvestInitiative,a privateagriculturegroupbasedinWashington,D.C. Globalwarming,too,ischangingfoodproduction.Scientistspredictthat risingtemperatureswillreducethegrowthofimportantcropslikewheatand corn.Low-inedevelopingcountrieswillbehitthehardest.Whenharvestsfall, cropsbeemoreexpensive.Andsincethosefoodsarealsousedtofeedanimals likecowsandpigs,meatprices,too,willrise. Allovertheworld,researchersareracingagainsttheclocktofigureout howbesttofeedmorepeopleinthefuture.Andsomesurprisingideashavebegun toappear.Threeyearsago,scientistsshowedthefirsthamburgermadefrommeat growninalab.Otherresearchersaredevelopingseedsthatcanmanagetolive evenduringhightemperaturesanddrought.Stillothersarefindingwaysto genes changethe(基因)ofmeatanimalssotheyproducemoremeatandcanstand theheat.Forexample,researchersinSouthKoreaandChinaarelookinginto developingasuper-pig.Theseresearchershavechangedthegenesinatypeof muscle pigtocreateananimalthatbeesbiggerandheavier,packingonmore(肌 肉).Typically,muscletissueisthepartofananimalthatbeesmeatforfood. BiologistJin-SooKimatSeoulNationalUniversityinSouthKorealeads