资源描述：
《新高考时文阅读26我们能否在减少化肥的同时养活世界 word版.docx》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、关于氮肥， 我们该如何权衡利弊每年的10月16日为世界粮食日，随着气候变化以及人们环保意识的增强，控制氮肥过度使用的问题越来越受大家重视，但氮肥又是粮食作物的重要肥料，我们究竟能否在减少化肥使用的同时养活世界，这个问题值得大家去思考。Morethananyotheraspectoftheclimatecrisis,itistheover-productionofcarbondioxidethathasbeenvalued.Butnitrogen（氮）,anditsabundantuseincommerc
2、ialfertilizer（化肥）,alsoleadstoairpollutionandclimatechange.Evidencesuggeststheirusealsocontributestoairpollution,increasestheratesofcancerandreducesbiodiversity,aswellasreleasinggas(laughinggas).Butnitrogenhelpsfeedaroundhalftheworld’spopulationandremains
3、essentialfortheforeseeablefuture.Withpricesoffertilizerrising,manydevelopingcountriesdon’thaveaccesstoit,withresultingthreatstofoodsecurity.Theglobalnitrogenchallengeinvolvesbothreducingfertilizeruse,andgettingittowhereit’sneededmost.Ateamofscientistshas
4、comeupwithafive-stepplantosolvethistwo-sidedproblem.BenjaminHoulton,theleader,explainsthatonlybyundertakingaholisticapproachandcombiningsolutionscantheproblembesolvedonbothlevels.Thefivestepsidentifiedinvolvechangingagriculturalpractices,gettingfertilize
5、rtotheplacesit’sneeded,reducingnitrogenpollutionandfinally,bothreducingfoodwasteandpromotingachangeindiet.Thelattertwoareessentialbecauseapproximatelyone-quarterofallglobalfoodproducediswastedalongthesupplychain,whichmeansthatalargeportionofthenitrogenfe
6、rtilizerappliedtocropsisultimatelywasted.Benjaminadmitsthataddingnitrogentothelistofexistingclimatewoesmightcauseasenseofexhaustion.Nevertheless,hehasanencouragingmessage.“Thetruthis,nitrogenisablessingandacurse,”hesays,“Butifyoucanreducethespill-oversof
7、nitrogen,youcanquicklygetsystemstoreturntoamoreoriginalstate.ThatmakesitverydifferentfromCO2.Welockin30to50yearsofclimateimpactseverytimewesendoutamolecule（微粒）ofCO2intotheair.Butwithnitrogenyoucangetimmediatereturnsoninvestment.”-3-1.Whydoestheauthorment
8、ioncarbondioxideinparagraph1?A.Tointroducetheharmofnitrogenpollution.B.ToexplaintheeffectsofproducingCO2.C.Topresenttheresultsofusingfertilizer.D.Toshowtheseriousnessofairpollution.2.What’sparagraph2mainlyabout?A.Theprices
