中学生英语演讲稿the great race
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thegreatrace
automakersspeedtowardthefuture
lastnight,wheniwassurfingonthenet,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,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.
