选择性必修四第三单元阅读5公开课.docx

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1、ACanadiancompany,P1anetaryTechno1ogies,hasannouncedthatitwi11proceedwithitsp1antore1easehundredsoftonsofmagnesiumhydroxideintotheseaofftheCornishcoast.Thecompany,sideaistoundertakeoceana1ka1inity（碱度）enhancement,aprocessthatincreasesthea1ka1inityofseawaterbyaddingana1ka1ineminera1toit,therebyconverti

2、ngCO2intosa1t.Themovehasbeencriticizedbyenvironmenta1istswhohaveca11edforthetria1tobeha1tedunti1furtherresearchisconducted.SueSayer,directoroftheCornwa11Sea1ResecirchTrust,haswe1comedtheinnovativeapproachbuthasrequestedfurtherenvironmenta1researchto1essenconcerns.RuthWi11iams,themarineconservationma

3、nagerattheCornwa11Wi1d1ifeTrust,hasa1sowe1comedtheinnovativeapproachbutisconcernedaboutthepotentia1forunintendedconsequences.P1anetaryTechno1ogiesstudied1ocationsacrosstheg1obebeforese1ectingComwa1ssha11owwatersforthetest.Cornwa11,swatersareidea1forCO2remova1becausethea1ka1inity-enhancedwaterneedsto

4、beincontactwiththeairfora1ongtime.Additiona11y,thewateriswe11-mixedorturbu1ent（汹涌的），whichshou1dhe1ptheprocess.Thecompanyreceiveda1icensetooperateforEng1andfromtheEnvironmentAgency,thecountry,sregu1ator.Theexperimentmarksasignificantsca1ingupofprevioustests,asthefirmre1easedon1yfourtonnesinthearea1as

5、tyear.However,Charginsaidthattheincreaseto200-300tonnesover90dayswassti11re1ative1ysma11,atdropinthebucket.Thecompanyisa1sop1anningtoincreaseitsbrucite（水镁石）re1easesinfutureprojects.Overa11,whi1etheapproachappearstobeinnovative,thereisaneedforfurtherresearchtominimizeanyunintendedsideeffects.Theenvir

6、onmenta1ists,concernsandtheca11tostopthere1easeofbruciteunti1furtherresearchisdonehigh1ighttheneedforacautiousapproachtowardsthesekindsofinitiatives.12. P1anetaryTechno1ogiesp1anstore1easemagnesiumhydroxideintotheseaofftheComishcoast.A. tostudytheeffectsofa1ka1ineminera1sonmarine1ifeB. toprovidesuff

7、icientminera1sformarine1ifeintheseaC. toincreaseoceana1ka1inityandtransformCO2intosa1tD. todisposeofthecompany,sexcessmagnesiumhydroxide13. Whyhasthemovebeencriticizedbyenvironmenta1ists?A. Itmaycausesomeunintendedsideeffects.B. Ithasnotbeenapprovedbythegovernment.C. Nore1evantresearchhasbeenconduct

8、edsofar.D. Thefirmhasn,tdecidedonthetonnestore1ease.14. Comwa1swatersareperfectforCO2remova1because.A. thewaterinthisareaisca1mandc1earB. thewatershaveaveryhigha1ka1inity1eve1C. thesha11owwaterscanbeexposedtotheairfor1ongD. thefirmon1yreceiveda1icensetooperateforEng1and15. Whichwordbestdescribestheauthor,sattitudetothefrm,sapproach?A.Pessimistic.B.Objective.C.Indifferent.D.Supportive.1215CACB