1、GlobalWarmingThereisoneofthemostsensitiveglobalclimateissuesforyears,whichisglobalwarming.Ingeneral,weknowthattheoriginofglobalwarmingistheemissionofcarbondioxide.Itwasverifiedthattherelationshipbetweencarbondioxideandtemperature:whenthereismorecarbondioxidethetemperaturegetswarmer.Thistopicshouldbe

2、discussedundercurrentsituationtoadvocatepeopleconcerningwiththissevereenvironmentalissue.Meanwhile,peopleshouldconsiderhowtoreducetheemissionofcarbondioxideandtakesomeactionstostopglobalwarming.Whatisglobalwarming?Whatcausedglobalwarming?Whatarethenegativeeffectscausedbyglobalwarming?Whatcanwedotosa

3、vetheearth?Arethereanypositiveeffects?Inthenextparagraphs,Iwillexplainthesequestionsindetails.Whatisglobalwarming?GlobalwarmingistheincreaseintheaveragetemperatureofEarthsnear-surfaceairandoceanssincethemid-20thcenturyanditsprojectedcontinuation(Brown22).Accordingtothe2007FourthAssessmentReportbythe

4、IntergovernmentalPanelonClimateChange,globalsurfacetemperatureincreased0.740.18C(1.3332F)duringthe20thcentury(Keppler).Innearly100years,theaverageglobaltemperaturegoesthroughfourfluctuations:cold,warm,coldagain,andwarmagain.After1980s,thetemperaturewasascendingobviously.Whatcausedglobalwarming?Itisc

5、ausedbyseveralfactors.First,populationexplosionisoneofthemainfactorsofglobalwarming;italsothreatensthebalancebetweenmanandnature.Second,atmosphericpollutionisbeingontherise,andithasalreadybecomeaninternationalmajorproblem.Itisalsothebasicproblemofglobalwarming.Third,marineecologyandenvironmenttookat

6、urnfortheworse.Thatmayleadtothedamageoffreshwaterresouces.Forth,erosion,salinization,anddesertificationoflandmaketheecologicalenvironmentdeteriorated,andfloodandsandstormmayhappenmorefrequently.Fifth,theforestresourcesaresharplydecreasedbynaturalchangesandhumanactions.Sixth,acidraincandestroythefore

7、sts,acidatelakes,andendangeranimals.Seventh,waterpollutiondestroyedthebalancebetweenthedemandandsupplyoffreshwater.Last,toxicchemicalwasteshavethreatsontheecologicalenvironmentontheearthsurface.(Brown46).Whatarethenegativeeffectscausedbyglobalwarming?Thisseriousenvironmentalproblemgeneratesamountofd

8、estructiveeffectstotheentireplanet:icemelting,climatechange,animalsandplantsextinction,andthreatofhumansociety.Primarily,asthetemperatureincreases,icemeltingisregardasthemostintractableissue.Meltingoficeraisesthesealevel.JonathanOverpeck,anearthscientistattheUniversityofArizonainTucsonthinkssealevel

9、risewilloccuratratesofuptoameterorthreefeetperonehundredyear(Brown102).Thisstatisticrevealstheraisingtemperatureisdetrimentaltoglobalclimateandthemainreasonwhyglobalwarmingresultsinsealevelrisingarestronglyduetothermalexpansion(Brown102).Whenthetemperatureoftheseabecomeswarmingthanbefore,thesealevel

10、willrise.Inaddition,asaresultoficemelting,landscapealsotransforms.Meanwhile,globalwarmingalsocausesclimatechangetobringaboutmanyotherawfuleffectssuchasmoredestructivestorms,morefiredisasterandmoreintensedroughts.Thesecondeffectofglobalwarmingistomakemanyanimalsandplantsendangered.Considerabledataver

11、ifiedthatmorethan200nativeplantspeciesintheUnitedStateshavegoneextinct;morethan760plantspeciesintheU.S.arefederallylistedasendangeredorthreatenedand20percentofournativeplantspeciesareindeclineandonaconservationwatchlist(Keppler).Assameasplants,therearealsomanyendangeredanimalsgeneratingwhichareimput

12、abletoglobalwarming,suchasPolarbears.SomescientistsbelievethePolarbearsinAlaskawouldbecomeextinctin50yearstime(Keppler).Thesedatawarnusthatwecallforpayingeffortonsurvivalofspecies.Thelastnegativeeffectofglobalwarmingismorerelatedtohumankind.Globalwarmingwillalsothreatenhumansociety.Itwillcausetheinf

13、ectiousdiseasestooeasytospreadandinfect.Bacteriawillhardtocontrolthroughfastbreederreactor,andthreatourlives.Thehousewillbeerodedbydestructiveinsectsanditmayleadavagrantlifeeventually.Whatsmore,globalwarmingimpedesoutdooractivities.Someoutsideentertainmentsportssuchasskiingandsnowboardwillbeinfluenc

14、edbyicemeltingandclimatechange.Nevertheless,whenwefacethesenegativeaffectswhichcausedbyglobalwarming,whatwecoulddotoagainstit?AsurveyconductedbyYaleUniversityandGeorgeMasonUniversityfoundthatthenumberofAmericanswhobelievedthatclimatechangewasajokeorscientificconspiracyhadmorethandoubledsince2008,to1

15、6percentofthepopulationfrom7percent.Anadditional13percentofAmericanssaidtheythoughtthateveniftheplanetwaswarming,itwasaresultsolelyofnaturalfactorsandwasnotasignificantconcern(Brown158).Thissurveyexposesacertainnumberofpeopledonotseenitasasevereproblem.Inordertoarousepeoplesconsciousnesstotakeaction

16、sagainstglobalwarming,enactingsomespecificregulationsandlawsareindispensablebythegovernment.First,forestprotectionisrequisite;onetypeofforestprotectionistopurchaselandtosecureit.Furthermore,enhancingtheinternationalcorporationtoconsistanAllianceisalsoaneffectivemethodtospreadtheconceptofconservingso

17、urces.Atclimatechangeconferencewhichheldin2009atCopenhagen.Therearefivenations,includingChinaandtheUS,reachedadealonanumberofissues,suchasarecognitiontolimittemperaturerisestolessthan2Candtheygotthedealtopromisetodeliver$30bn(18.5bn)ofaidfordevelopingnationsoverthenextthreeyears,andoutlinedagoalofpr

18、oviding$100bnayearby2020tohelppoorcountriescopewiththeimpactsofclimatechange(Revkin).Ofcourse,educationisessentialasaportiontopromptchildrensenvironmentalocomsess.Throughtheeducation,itconveysanappropriateenvironmentalconcepttothekids,forinstance:takingpublictransportation,savingenergyandrecyclingwa

19、stesubstance.However,isthereanypositiveeffect?Yes,thereis.Thewidespreadknowledgeofglobalwarminghasalreadywakedtheconsciousnessofresidentsthroughouttheworld.Oneofthemajorconcernsinconservationistheuseofplasticbags.Plasticbagsaregivenawaytoofreelybymanystores.Theamountofwasteisalarmingaswearereachingt

20、onsofwasteeachyear!Plasticwasteispollutingtheenvironmentandweneedtoaddressitnow.Thereareseveralthingsbeingdonetobringplasticrecyclingtotheforefrontwheretheseplasticbagsareconcerned.Companieshavestartedtotakestepstoreducethenumberofplasticbagsbeengivenawayintheirdailyoperations.SomeSolutionsSomecompa

21、niesplacerecyclingbinsattheirstores.Whencustomerscomebacktothestoretheycanbringtheirbagsandrecyclethemeasily.However,thenumberofbagsleavingthestoreandthenumberreturningarenotquiteequalwithfarmoregoingoutthencomingback.Therearestoresthatevenremovetheuseofbags.Thestoreshavestartedtoencouragetheuseofcl

22、othshoppingbagsandsomestoresaskthecustomerstopurchasetheirownbags.Someconsumershavealreadyjumpedontheideaandbringtheirownbagswhentheygoshopping.Whosayyoucannotchangetheworld?April22ndistheEarthDay,anditisdesignedasadaytoinspireawarenessandappreciationfortheEarthsenvironment.Whatwillyoudoonthatday?It

23、hinkitshouldbeexpandedtofouraspects:food,clothing,shelter,andtransportation.First,forfood,weshouldeatvegetablesinsteadofmeats.Eatlessorevenhaveanabsolutediet!RefusetousecupsmadebyStyrofoam,becauseStyrofoamcannotberecycledeventheproductsareexistingmorethanseveralhundredyears.Second,forclothing,weshou

24、ldknowwhichmaterialcanberecycled.Also,weshouldslowdownthefrequencyofbuyingnewclothesinordertoreducetherecyclecost.Third,forshelter,weshouldsavingwaterandelectricity.Itisgoodtogrowsomegreenplantsinourhouses,andsecond-handfurnitureisenvironment-friendlyandmoneysaving.Fourth,fortransportation,wecanchoo

25、seonedaytonotdriveweekly,takingbusesorwalkinstead.Onethingwemustnoticeis,balloonsaremadeofbiorefractorycompounds,thatis,akindofmaterialthatcanhardlyrecycle.Itwillalsocausethedeathofrareanimalsiftheyeatballoonsbyaccident,soweshouldbetternotbuyballoons,aswellasStyrofoamcupsandplasticbags.Inconclusion,globalwarminghashazardtocausesealevelriseandclimatechange:itleadstotheextinctionofplantsandanimals,whilehinderspeoplesdailifeandthreatenshumansociety.Italsohasfewpositiv