中學生英語演講稿－the great race

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thegreatrace

automakersspeedtowardthefuture

lastnight,wheniwassurfingonthenet,公務員之家版權所有，全國公務員共同的天地!iwasattractedbyaword:

hydrogeneconomy.ididn''''tknowwhatitmeant,andmaybemostofyou

didn''''t,either.soiwentonreadingandfinallygotit.andtoday,ifeel

soluckytotellyousomethingaboutit.andiamgoingtodividemy

speechinto4parts.

let''''sbeginourfirstpart.

scienceorsciencefiction?

iusedtoreadalotofsciencefiction.thefutureofenergyand

transportationweresubjectsclosetomyheart.thelimitlesspowerof

coldfusion.thewonderofmatter-antimatterreactors.thechallengeof

dilithiumcrystalsandwarpdrive.ialmostbelievedit.iwantedto

believeit.butasitturnsout,thefutureofenergyisandalwayshas

beenallaroundus.itisasnaturalaswind,sunlightandwater.science

overtakessciencefictionandgivesus…hydrogen!iadmitthatitis

terriblyanticlimactic.butthenwemustrealizethatthischanges

everything.especiallyinenvironmentalprotection.butwhenwillthe

hydrogeneconomygethere?

powerfulmotivation

prioritiesarechanging.youonceheardabouttheworld''''ssupplyofoil

runningout,whichitis.weonceworriedabouttheecologicaleffectsof

automobilepollution.butnow,thebattlecryissecurity.weneedenergy

securityandpowermaderighthereathomeandlotsofit.wonderful,

abundant,clean,renewable,sustainablepower.weneedtobeaboutthe

taskoffindingalternativefuelsandenergysources.inthemeantime,we

needtowanourselvesfromdependenceonmid-eastoil,useouroil,use

ouroilmoreefficientlyand,almostasanafterthought,lowerlevelsof

pollutionfromourvehicles.

efficiencyandcleanliness,whileperhapsbeingnexttogodliness,have

latelytakenabackseattosecurity.however,researchanddevelopment

effortsaremutuallybeneficial.thenextgenerationoffuelwillbeboth

cleanerandlocallymade.majorautomanufacturersandoilcompanieshave

oftenbeenseenaspartoftheproblem(wecan''''tbuywhattheyrefuseto

make).but,fromtheirperspective,公務員之家版權所有，全國公務員共同的天地!theycan''''tsellwhatwedon''''twantto

buy..tothem,itisourpenchantforgas-guzzlingsportsutilityvehicles

thatisdangerous,wastefulandsuddenlyunpatriotic.

hydrogensourcesandsupplyinfrastructure

hydrogenisabundant,buttherearesupplyproblems.hydrogenisalmost

neverfoundinitspureform.itisalreadycombinedwithotherelements

toformwateroranynumberoforganiccompounds.togetpurehydrogen,

youhavetoseparateitfromsomething.inthecaseofwater,theprocess

iscalledelectrolysis.inhydrocarbonfuels,itiscalledreformation.

althoughhydrogenhasbeensuccessfullyreformedfromallmajorfuels,

industrialapplicationsforhydrogentodaygenerallyrelyonreformingit

fromnaturalgas.thistechniquecanatbestbeashort-termsolutionif

thegoalistobeindependentfromfossilfuels.othersourcesofhydrogen

includeglucose,sodiumborohydrideandevenbacterialcomposting.notall

ofthesewillmakethecut.renewabilityisakeyissue.themoney,time

andefforttoturngtasfillingstations,hydrogenfillingstationsis

mindandbudget-boggling.

theotherproblemissupplyinfrastructure.themoney,timeandeffortto

turngasfillingstations.thereisconsiderablementalenergygoinginto

solvingtheseproblems,buttheywillnotbeso;vedquicklyorcheaply.at

leastibelieve.