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我预 outerspacespaceflight太空飞行spaceexploration太空探险spacetourism太空旅游业spacemissions航天计划mannedmissions载人航天计划space/orbitalstation空间站astronaut宇航员involvehighrisks涉及到很高的风险huge/enormouscosts astronomicalcost天文数字般巨大的成本increasetheburdenontaxpayers增加纳税spacejunkwaste太Spacetravelhasbeenpossibleforsometimeandsomepeoplebelievethatspacetourismcouldbedevelopedinthefuture.Someworryitisanegativedevelopment.What'syour?开头：导入背景+个人观Since1969whenhumankindsuccessfullylandedonmoon,moreastronautshavebeensenttoouterspace,andacrazeofspacetravellinghasgraduallysweepedamonganincreasingnumberofpeople.However,therearesomecontroversiesregardingspacetourism.Frommypointofview,Ibeliveitisaposotivedevelopment.的论论点论据：greatriskbecauseofthelimitedofspacetechnology论点2：huge论据1：increasethetaxrevenue论据2：theconsumptionoffuel论点3：spacepollution论据：space扩充论点Itistruetherearesomenegativeenfluencethatcouldnotbeignoredifdevelo thespacetravellingintoalarge扩充论据：greatriskbecauseofthelimitedofspaceFirstofall,thegreatrisksbecauseofthelimitedofspacetechnologywillbenotavoided.Acutally,afewaccidentshappeninginthehistoryhavealreadyledtotheinterrogatoryandsuspensionofspaceexplorationprojects.论点2：huge论据1：increasethetaxWhat'smore,theenormouscostattheinitialstageof andimprovingthetechnologywillincreasethepressureontaxpayers.论据2：theconsumptionofAdditionally,themannedmissionalsohastoconsumeagreatdealoffuelandnaturalresources,whichindeedputsextrasressonourenvironment.进一步扩展：SincethewholeprojectispaniedwithastronomicalcosttheticketofspacetourwillbeveryexpensiveoutofquestionAsaresultitwouldbeaprivilegeofwealthypeopleandbeyondtheaffordabilityofordinary论点3：spaceEvenworse,theenvironmentalproblemscausedbyspacetourismcanexpandtooutersp