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1、Changesthat21stcenturywillbringEnglishB111No.25TangNo.28PrescillaTechnologyisbeingdevelopedatanamazingandunprecedentedspeednowadays.The21stcenturyisarrived,anditisboundtobeverydifferentfromthepreviousone,aswecanexpectthatthespeedatwhichtechnologiesareinventedandexpandeduponwillcontinuetoincrease.
2、Ibelievethatthemajorchangesthatwewillseeinthiscenturywillbefoundinenvironmentalissues,healthissuesandelectronictechnologyaccess.21stcentury’senergyresourcesIntoday’sworld,energyproblemshasbecometheworld’sfocus.Why？Becausethereisalargepopulationaroundtheearth,andsmallreservesandfewaverageamountall
3、contributetothesituationnow.Thefirstbiggestchangeisourenvironmentalissues.wearelivinginthenaturalenvironment,everythingofthenatureiscloselyboundupwitheachofushumanbeings.Inmysubmission,therearetwomajorpartswillchangeinthe21stcentury,oneistheVIenergycrisis,andtheotheristhenewenergy.Asweallknow,the
4、rebecomeslessandlessnaturalenergies.Resourceshortageisbeingacommonconcernwiththefast-growingdevelopmentofoursociety.Everyoneknowsindustriesneedcoal,oil,andiron,whilemanufacturingdemandswater,plasticandothermetals.Allthesematerialsaregivenbyourearth,andasthenewdiscussionamongcountries,theyultimate
5、lyreachanagreement,andre-planthestructureofnaturalresources.In21stcentury,energycrisisisnolongeraseriousproblem,forwehavefoundabettersolution.Tosayspecifically,thesolarenergyisaperfectreplacement.Itisakindofclean,high-efficientandinexhaustibleenergy.Besides,thesolarenergy’sgreateststrengthisthati
6、tisrenewable.Nowadays,renewableenergyhascomeof,andtheworldisturningtorenewableenergyresourcesgradually.Thesolarenergygetseasybutusesdurable.Quietrecently,manhassucceededinconvertingsunlightdirectlyintoelectricalenergyorothercleanenergies.Furthermore,thesolarenergyhasputintouseinallindustries,such
7、asmanufacturingindustry,businessfield,buildingindustry,agricultureplanting,metallurgicalindustryandsoon.Itisafactthatwearegettingridoftheobsoleteenergyresources,likecoal,oilsuchrareandpoor-efficientmatters.VIIntermsoft
