COP26 后 ： 在香港及其他地区应对气候变化

PostCOP26 CombattingclimatechangeinHongKongandbeyond Calltoaction:Thebuiltenvironmentmustplayitsparttomitigateandadapttoclimatechange Thisreportpresents: •AsummaryofCOP26 •InsightsonhowCOP26linkstothebuiltenvironment •ReflectionsandrecommendedactionsforHongKong: •Decarbonisationandadaptationofthebuiltenvironment •Towardscleanenergy •Low-andzero-carbontransportsystems •Nature-basedsolutions Actingnowisouronlyoption.WemustacceleratethepaceoftheRacetoZeroandsimultaneouslypickuptheRacetoResilience. Sharedproblemscallforsharedsolutions:weallhavearoletoplay–sharingideas,providinginsightsandutilisingouruniquespheresofinfluence. Forourselvesandourfuture. Climatechangeishappeningmorerapidlythanscientistshavepredicted,withheatwaves,droughts,forestfires,rising sealevelsandothernaturalphenomenabecomingincreasinglyfrequentandstartingtohavesignificantimpacts.Climatechangeisprimarilyduetohumanactivitiesreleasinglargeamountsofcarbondioxide(CO2)andmethaneintotheatmosphere. CO2emissionshaverisenbymorethan50%comparedwithpre-industrial levels,fromabout278partspermillion(ppm)toabout417ppminearly2021.Theglobalaveragetemperatureinthe2000-2019periodwas1.2°Chigherthaninthe1850-1900period.Based ontheagreementreachedatthe2021ConferenceoftheParties(COP26)totheUnitedNationsFrameworkConventiononClimateChange,analystsfromresearchgroupClimateActionTrackerpredicta2.4°Cincreaseby21001. ARacetoZeroemissionsisnecessarytohaltglobalwarming.Evenifsuchefforts aresuccessful,however,theadverseeffectsofariseinCO2havealreadybeenlockedintotheclimatesystem.Thismeansthatclimatechangeimpactswillcontinueformanyyears,giventhetimelagbetweenproducingcarbonemissionsandseeingtheireffectsontheclimate. Themetaphorofaheavytrainisoftenused:youcan’tstopitatonce;therewillbeadelaybetweenhittingthebrakesandthetraincomingtoahalt. Inviewofthat,weurgentlyneedtoadaptandbraceourselvesforwhatwecannotprevent.TheUN-backedRacetoResiliencecampaignaimstocatalyseastepchangeinglobalambitionforclimateresilience.Thisprogrammeputspeopleandnaturefirst,inpursuitofaresilientworldwherewedonotjustsurviveclimateshocksandstresses,butthriveinspiteofthem. Asacommunityofcitystakeholders,wecanhelpturnpledgesintoaction.Thispublicationoffersinsightsintohowpractitionersofthebuiltenvironmentcancontributetothecollective2050goalofachievingnet-zeroemissions,capitalisingontheoutcomesof COP26andgivingprioritytothemostvulnerablepeopleandcommunities. By2030 Operationalcarbon Embodiedcarbon Netzero - Netzero 40%reduction Netzero 40%reduction - 40%reduction By2050 Operationalcarbon Embodiedcarbon Netzero - NetzeroNetzero - Netzero NetzeroNetzero Climateactionroadmap:Netzerotargets TheclimateactionroadmapandassociatedfivestepsshowninthetwodiagramsconsolidateanumberofroadmapsandcommitmentsproposedbyArup,WBCSDandWorldGBC234.Theyoutlineasharedvisionandtheindustry-wideactionsneededtoachievenetzerointheconstruction,operationanddemolitionofbuildingsandinfrastructure.Theyalsodescribethestepsthatarerequiredtomakeourbuiltenvironmentmoreresilienttoclimateshocksandstresses. Inaddition,allstakeholdersofthebuiltenvironmentarecalledupontoadheretothreeoverarchingactionsthatwillaccelerateprogress. Mainstreambestpractice Introducemandatorywholelifecyclecarbonassessmentsthatfollowclearguidelines.Bestpracticesinmitigationandadaptationshouldbepromotedtoencourageat-scaleadoption. Monitorandreport Discloseprogressonclimateactions,suchasperformancedataandclimateresilience,tofostertransparencyandaccountability. Forgepartnerships Promotepublic-privatepartnershipstofast-trackactionandoptimiseimpact.Closercollaborationbetweenindustry,policymakersandthefinancesectorisessential. Existingbuildings Renovations Newbuildings Infrastructure Climateactionroadmap:Fivestepstotake 1 Demonstrateleadershipandinsight RacetoZero RacetoResilience Setdecarbonisationtargetsforthefulllifecycle Assessclimaterisksandtheirimpactoncriticalinfrastructure Trackandcommunicateclimateactionprogress Implementadaptationmeasureswhererequired Discloseannualperformancedata Prepareforemergenciesandenhancepublicawareness Collaborateforwiderimpacts DrVincentCheng 2 FellowandEastAsiaSustainabilityLeader,Arup LawrenceIu 3 ClimateChange&PartnershipsLead,CivicExchange 4 LouisWong Chairman,InstitutionofCivilEngineersHongKongAssociation RolandHunziker 5 Director,SustainableBuildings&Cities,TheWorldBusinessCouncilforSustainableDevelopment CristinaGamboa CEO,WorldGreenBuildingCouncil 6 Content COP26:successorfailure?8 Buildingambition:thefutureofthebuiltenvironmentpost-COP2612 Decarbonisingthe40%:howtotransformthebuiltenvironmenttonetzero14 TheAsianperspective16 HongKong’sClimateActionPlan205018 RecommendedclimateactionsforHongKong22 –Decarbonisationandadaptationofthebuiltenvironment24 –Towardscleanenergy26 –Low-andzero-carbontransportsystems28 –Nature-basedsolutions30 References32 COP26:successorfailure? DrVincentCheng,FellowandEastAsiaSustainabilityLeader,Arup ProfRobertGibson,Fellow,CivicExchangeKeyhighs:5 •Anincreasefrom40%to90