Solarcarscombinetechnologytypicallyusedintheaerospace,bicycle,alternativeenergyandautomotiveindustries.Thedesignofasolarvehicleisseverelylimitedbytheamountofenergyinputintothecar.Mostsolarcarshavebeenbuiltforthepurposeofsolarcarraces.Exceptionsincludesolar-poweredcarsandutilityvehicles.

　　Solarcarsareoftenfittedwithgaugesasseeninconventionalcars.Inordertokeepthecarrunningsmoothly,thedrivermustkeepaneyeonthesegaugestospotpossibleproblems.Carswithoutgaugesalmostalwaysfeaturewirelesstelemetry,whichallowsthedriver'steamtomonitorthecar'senergyconsumption,solarenergycaptureandotherparametersandfreethedrivertoconcentrateondriving.

　　SolarcarsdependonPVcellstoconvertsunlightintoelectricity.Infact,51%ofsunlightactuallyenterstheEarth'satmosphere.Unlikesolarthermalenergywhichconvertssolarenergytoheatforeitherhouseholdpurposes,industrialpurposesortobeconvertedtoelectricity,PVcellsdirectlyconvertsunlightintoelectricity.Whensunlight(photons)strikePVcells,theyexciteelectronsandallowthemtoflow,creatinganelectricalcurrent.PVcellsaremadeofsemiconductormaterialssuchassiliconandalloysofindium,galliumandnitrogen.Siliconisthemostcommonmaterialusedandhasanefficiencyrateof15-20%.

　　Aboutthediscussionwe’vehadaboutwhetherChinashoulddevotemajoreffortstodevelopingcarindustry,opinionsaredividedonthequestion.60%ofthestudentsthinkweshouldtryourbesttodevelopthecarindustry.Ononehand,carswillnotonlymakecontributionstoChineseeconomy,butalsoprovidemorejobsfortheChinese.Ontheotherhand,withmorecarscomingintoourlife,itwillbecomemorecomfortableandsaveourtime.

　　However,wellgoesanoldsaying,“Everycoinhastwosides.”Carswillalsohaveabadeffectonourlife.Therefore,thereare40%ofthestudentswhothinkweshouldreducecars.Themorecarswehave,themoreroadsweneed.Thereisnodoubtthatcarswillleadtotrafficjamandmoreaccident.Besides,carsproducewastedgas,whichwillpollutetheair.

　　AsfarasI’mconcerned,thoughweshoulddevelopoureconomy,itistheearthweliveonthatismoreimportant对不起,我喜欢英语作文,一不小心写多了