中学生英语演讲稿thegreatrace英语演讲稿thegreatraceautomakersspeedtowardthefuturelastnight,wheniwassurfingonthenet,iwasattractedbyaword:hydrogeneconomy.ididn’’’’tknowwhatitmeant,andmaybemostofyoudidn’’’’t,either.soiwentonreadingandfinallygotit.andtoday,ifeelsoluckytotellyousomethingaboutit.andiamgoingtodividemyspeechinto4parts.let’’’’sbeginourfirstpart.scienceorsciencefiction?iusedtoreadalotofsciencefiction.thefutureofenergyandtransportationweresubjectsclosetomyheart.thelimitlesspowerofcoldfusion.thewonderofmatter-antimatterreactors.thechallengeofdilithiumcrystalsandwarpdrive.ialmostbelievedit.iwantedtobelieveit.butasitturnsout,thefutureofenergyisandalwayshasbeenallaroundus.itisasnaturalaswind,sunlightandwater.scienceovertakessciencefictionandgivesus…hydrogen!iadmitthatitisterriblyanticlimactic.butthenwemustrealizethatthischangeseverything.especiallyinenvironmentalprotection.butwhenwillthehydrogeneconomygethere?powerfulmotivationprioritiesarechanging.youonceheardabouttheworld’’’’ssupplyofoilrunningout,whichitis.weonceworriedabouttheecologicaleffectsofautomobilepollution.butnow,thebattlecryissecurity.weneedenergysecurityandpowermaderighthereathomeandlotsofit.wonderful,abundant,clean,renewable,sustainablepower.weneedtobeaboutthetaskoffindingalternativefuelsandenergysources.inthemeantime,weneedtowanourselvesfromdependenceonmid-eastoil,useouroil,useouroilmoreefficientlyand,almostasanafterthought,lowerlevelsof---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---pollutionfromourvehicles.efficiencyandcleanliness,whileperhapsbeingne_ttogodliness,havelatelytakenabackseattosecurity.however,researchanddevelopmenteffortsaremutuallybeneficial.thene_tgenerationoffuelwillbebothcleanerandlocallymade.majorautomanufacturersandoilcompanieshaveoftenbeenseenaspartoftheproblem(wecan’’’’tbuywhattheyrefusetomake).but,fromtheirperspective,theycan’’’’tsellwhatwedon’’’’twanttobuy..tothem,itisourpenchantforgas-guzzlingsportsutilityvehiclesthatisdangerous,wastefulandsuddenlyunpatriotic.hydrogensourcesandsupplyinfrastructurehydrogenisabundant,buttherearesupplyproblems.hydrogenisalmostneverfoundinitspureform.itisalreadycombinedwithotherelementstoformwateroranynumberoforganiccompounds.togetpurehydrogen,youhavetoseparateitfromsomething.inthecaseofwater,theprocessiscalledelectrolysis.inhydrocarbonfuels,itiscalledreformation.althoughhydrogenhasbeensuccessfullyreformedfromallmajorfuels,industrialapplicationsforhydrogentodaygenerallyrelyonreformingitfromnaturalgas.thistechniquecanatbestbeashort-termsolutionifthegoalistobeindependentfromfossilfuels.othersourcesofhydrogenincludeglucose,sodiumborohydrideandevenbacterialcomposting.notallofthesewillmakethecut.renewabilityisakeyissue.themoney,timeandefforttoturngtasfillingstations,hydrogenfillingstationsismindandbudget-boggling.theotherproblemissupplyinfrastructure.themoney,timeandefforttoturngasfillingstations.thereisconsiderablementalenergygoingintosolvingtheseproblems,buttheywillnotbeso;vedquicklyorcheaply.atleastibelieve.---本文来源于网络，仅供参考，勿照抄，如有侵权请联系删除---
