有关能源的托福作文

大家在备考托福作文时，可以阅读一些优秀托福范文的写作思路，这样对大家的写作是很有帮助的。

有关能源的托福作文

Inthecontextofincreasinglyseverepollution,somepeoplestatethatfossilfuels,oneofthemaincontributingfactors,shouldbereplacedbycleanerenergies.Others,however,citetheirconcernoverthehigherexpenditureofthosealternativeresources.Frommyperspective,atpresent,traditionalenergysourcesoughttocontinuetoplaythecrucialroleinsupplyingenergy,whiletheresearchonmakingcleanerenergymoreeasilyavailablecannotbedelayed.

Inhumanhistory,suchtraditionalsourcesascoalandoilhavebeenservingasthemainresourcestogenerateelectricityaswellasallowthevehiclestorun.Despitethefactthatthosefossilfuelshavehadadetrimentaleffectontheenvironment,suchastheeffluentsfromfactoriesandautomobilewaste,itisnexttoimpossibletothoroughlyreplacethemimmediately,giventhelackofawidelyusedcleanenergy.However,importancecanbeattachedondevelopingthetechnologytopurifythepollutedemission.Besides,thehighercostofthecurrentcleanerenergiestheincapabilitytooptimizethemcannotbeignored,whichpreventsthemfrombecomingwidespread.

Nevertheless,essentialattentionissupposedtobeputontheexploitingthecleanenergies,duetothefactthatcapitalizingonthemisabletoconservetheenvironmentandtraditionalenergiesarereducingatanalarmingrate.Ontheonehand,therehasbeenareliablepredictionthatthelefttraditionalfuelscouldonlysustainfornomorethanacentury,whichcallsfordevelopingalternativecleanerenergieswithoutdelay.Ontheotherhand,humanbeingsareconfrontedwiththeunprecedentedenvironmentalheadaches,theglobalwarming,risingsealevelandozonelayerhole,allofwhichrequireeffectivemeasures.Otherwise,humanbeingswillbepushedontothebrinkofdisasterandfindingalternativecleanerenergieswouldbeabletoeasethesituation,asfossilfuelsareoneofthemainreasonsleadingtothepressingproblems.

Therefore,itcanbeconcludedthatthereisaneedforthetraditionalfossilfuelstoenacttheroleofsupplyingenergyandpower,whereasitisadvisablefortheauthoritiestoexploitalternativecleanersourcesofenergyforthesakeofpreservingtheenvironmentaswellasthesustainabledevelopmentofhumansociety.

保护能源的方式托福作文

Hereonearth,everincreasingquantitiesofenergyarebeingexpendeddaily.Ofcourse,socialdevelopmentreliestremendouslyontheexplorationandutilizationofnaturalresources.Therefore,inordertosaveourplanetfromfurtherdestructionwhileensuringfundamentalhumanneedsaremet,abalancedenergyconservationplanshouldbedevelopedbythegovernment.Somepeopleholdtheviewthatincreasingthepriceofgasolineandelectricityistheonlywaytosolvesuchadilemma.Honestlyspeaking,Idonotconsiderthistobetheonlywaytomeetthisobjective.

Firstandforemost,thereiseveryreasontoemphasizetheurgencyinconservingenergy.Therapidpaceineconomicprosperityhasledtounprecedentedhighrateofenergyconsumption.Ifsuchatrendcontinueswithoutefficientcontrol,mostofthepreciousnaturalresourcesmaybedepletedwithinashorttime.Thus,nolongerwouldtheybeavailableforhumanneedsandsocialdevelopmentwillbetrappedinacrisis.Moreover,theburningoffossilfuelsisamajorcauseofglobalwarmingwhichdisruptstheglobalclimateandcausessealeveltorise.Undernocircumstanceshouldtheseshockingfactsgounrecognizedbythegovernment.

Withreferencetoraisinggasolineandelectricityprices,thismightbeatemporaryapproach.Admittedly,ifprivatecarownersareforcedtopaymore,anumberofthemmightcautiouslylimittheuseofcarsduetothehighercost.Thus,thetotalamountofgasolineconsumptionwillbereduced.Thesameistruewiththeriseofelectricityprices.Itwillremindpeopleofthenecessitytoformgoodhabitsofsavingelectricityindailylife.Forinstance,someofthemmaystarttoturnoffthelightsduringday.However,therecouldbehiddenproblems.Toillustrate,temptedbybiggerprofits,someoilcompaniesmightexploitmoreoilfields,whichwillintroducemoreenvironmentalproblemslikeairandwaterpollution.

Infact,othermeansofenergyconservationalsodeservefocusedattentionfromthegovernment.Oneoftheseeffectivemethodsistofacilitatethereplacementofnon-renewableresourceswithrenewableenergy.Inthisway,moreenergymightbeconservedduetothereductioninexploitation.Besides,suchrenewableresourceslikesolarpowerandwindareenvironmentallyfriendlyandcannevercausepollution.Undeniably,ifmoresolarproductsareinventedandmanufacturedforordinaryhouseholds,fewernaturalresourceswillbeconsumedandpollutionwillbereducedatthesametime.Therefore,thegovernmentshouldhelppromotetheuseofrenewableresourcessoastouseenergyefficiently.

Toconclude,thereisstillalongwaytogobeforetheissueofenergyconservationisfinallysettled.Maybeitisalogicalapproachforthegovernmenttoraisethepriceofgasolineandelectricity.However,thesideeffectsofsuchactionshouldnotbeoverlooked.Meanwhile,othermethodsalsoneedtobeconsidered.Withintheofficialenergyguidelines,everypersoncansupportenergyconservationintheirownway.

可再生能源托福作文

Carmanufacturersandgovernmentshavebeeneagerlyseekingareplacementfortheautomobilesmainsourceofpower,theinternal-combustionengine.Byfar,themostpromisingalternativesourceofenergyforcarsisthehydrogen-basedfuel-cellengine,whichuseshydrogentocreateelectricitythat,inturn,powersthecar.Fuel-cellengineshaveseveraladvantagesoverinternal-combustionenginesandwillprobablysoonreplacethem.

Oneofthemainproblemswiththeinternal-combustionengineisthatitreliesonpetroleum,eitherintheformofgasolineordieselfuel.Petroleumisafiniteresource,someday;wewillrunoutofoil.Thehydrogenneededforfuel-cellenginescannoteasilybedepleted.Hydrogencanbederivedfromvariousplentifulsources,includingnaturalgasandevenwater.Thefactthatfuel-cellenginesutilizeeasilyavailable,renewableresourcesmakesthemparticularlyattractive.

Second,hydrogen-basedfuelcellsareattractivebecausetheywillsolvemanyoftheworldspollutionproblems.Anunavoidableby-productofburningoiliscarbondioxide,andcarbondioxideharmstheenvironment.Ontheotherhand,theonlybyproductoffuel-cellenginesiswater.

Third,fuel-cellengineswillsoonbeeconomicallycompetitivebecausepeoplewillspendlessmoneytooperateafuel-cellenginethantheywilltooperateaninternal-combustionengine.Thisistrueforonesimplereason.Afuel-cellautomobileisnearlytwiceasefficientinusingitsfuelasanautomobilepoweredbyaninternal-combustionengineis.Inotherwords,thefuel-cellpoweredcarrequiresonlyhalfthefuelenergythattheinternal-combustionpoweredcardoestogothesamedistance.