GMAT阅读解析练习之农业—甲烷排放-智课教育

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1、智课网GMAT备考资料GMAT阅读解析练习之农业—甲烷排放-智课教育GMAT阅读最重要的就是要学会分析文章结构，理清文章脉络，把握作者的逻辑态度，简而言之就是要不断提高自己的阅读能力。但提高阅读能力不是一朝一夕就能实现的，为此，小编专门整理了一系列的GMAT阅读解析练习，里面包含了文章结构，题材分类，作者评价，难句解析……所有分析都淋漓尽致堪称完美，最大程度满足学生需要。希望能帮助大家不断提高阅读能力，最终取得满意的成绩。今天小编为大家整理的是关于Agriculture--METHANEEMISSIONS的完美解析，赶快学起来吧。Agricul

2、ture--METHANEEMISSIONSThereleaseofmethanegasfromruminantlivestock(sheepandcattle)amountstoalmost1/3ofNewZealand'sgreenhousegasemissions,anditisthelargestcontributor.Methanealsoaccountsforover40%ofallemissionsintermsofglobalwarmingpotential.However,internationallythedominants

3、ourcesofmethanearericepaddiesandwetlands,notfarmanimals.NewZealandthereforehasaspecialinterestinthemeasurementandmitigationofmethaneemissionsfromlivestock.TheinventoryofNZ'sgreenhousegasemissionsiscalculatedannuallybytheMinistryfortheEnvironmentandreportedinternationally.Acc

4、ordingtothisinventory,methaneemissionsfromruminantshaveincreasedby10%since1990.(Overthesameperiod,carbondioxideemissionsfromroadtransporthavegrownby62%,andnitrousoxideemissionsfromagriculturalsoilsby25%.)Measurementsofmethaneemissionratesonsheepanddairycowshaverepeatedlyshow

5、nthatthevariabilityofemissionsbetweenindividualanimalsislarge(e.g.foryoungsheepgrazingthesamepasture,emissionratesvariedfrom9to35g/daypersheep).Whilethisvariabilitymayonedaybeexploitedtoreducemethanereleasebyselectingforlow-emittinganimals,itisnotwellunderstood.Italsoleadsto

6、uncertaintyinthenationalinventorycalculations,whicharebasedonmeasurementsatthe"animalscale",i.e.fromsmallsamplesofanimals(typically20).Inordertoquantifythisuncertainty,datarepresentativeforlargernumbersofanimalsundertypicalfarmmanagementpracticeareneeded,inotherwords,measure

7、mentsatthe"farmscale"or"paddockscale"arerequired.JohannesLaubachandFrankKelliherofLandcareResearchhavedevelopedmicro-meteorologicaltechniquesformeasuringpaddock-scaleratesofnetmethaneemissionsfromherdsorflocksoffreelygrazinganimals."Micro-meteorological"meansthatwindtranspor

8、toftheemittedgas,awayfromtheanimals,isusedasavehicletodeterminetheemissionr