建筑環(huán)境中的氣候變化適應(yīng)力行業(yè)指南

Weneedtoputpeopleand naturefirstinpursuitofa worldresilienttoclimatechange-wherewedon’tjust surviveclimateshocksandstresses,butthriveinspiteof them.Itisfundamental toconsiderresilience, adaptation,hazardandclimatemitigationofourbuilt environmentaspartofourtransitiontoanequitableandsustainablefuture.

Thispaperfocusesonresiliencewithinthebuiltenvironmenttonaturaldisastersandweatherconditionsthatareexpectedtoincreaseinseverityduetotheimpactsofclimatechange.Theseincludeextremesoftemperature,bothheatandcold,drought,stormsandflooding.Widernaturaldisasters,includingearthquakes,volcaniceruptionsandextremeweathereventssuchaswildfiresorflashfloodsarealsocriticaltoconsider,howevertheseeventscan

rarelybemitigatedorlessenedinseveritywithresiliencemeasures.

3

WORLDGREENBUILDINGCOUNCIL

CLIMATERESILIENCEINCONTEXT

Morepeopleareatrisktodayfromtheimpactsofclimatechangethaneverbefore.

Changingclimatepatterns,andincreasedfrequencyandseverityofweathereventsisimpactingeverygeographyintheworld.

Vulnerabilityisheighteninginthecontextofglobal

populationgrowth.Asconstructiononfloodplains,

storm-proneareasandotherhigh-riskareasincreases,

thelikelihoodofamajorcatastropheconsequently

increasestoo.Decarbonisingoursociety,restoringnatureandecosystemservicesandtacklingourproductionandconsumptionofmaterialsandproductsareessentialforustomitigatefurtherclimatechange.

However,theimpactsofclimatechangearealreadybeingfelt,andarelockedinfordecadestocome.Thebuildingsandinfrastructureofourcitiescancontinuetocontributetotheseproblems-ortheycanbepartofthesolution.

Resilienceisaboutembeddingsolutionsandadaptabilityintothecorepurposeofthebuiltenvironment.

‘Resilience’isthe“abilityofasystem,communityorsocietyexposedtohazardstoresist,absorb,

accommodatetoandrecoverfromtheeffectsofahazardinatimelyandefficientmanner,includingthroughthepreservationandrestorationofits

essentialbasicstructuresandfunctions.”

UnitedNationsofficeforDisasterRiskReduction,2022

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

ARESILIENTVALUEPROPOSITION

Thereisaclearvaluepropositionforaresilientandadaptablebuiltenvironmentatregulatory,organisationalandowner/occupierscale,whichincludesdriversandbenefitsalongsidethecostofinaction:

DRIVERSANDBENEFITS

Fornationalandlocalgovernment

?Buildrelationshipswithpartnersandcommunitiesbycooperatingonresiliencemeasures.

-Alignwithinternationalguidanceandandregulationsonclimateadaptationandfinancingregulations.

-Enhancelong-termgrowthprospectsbyprotectinglivelihoodsoflocalpeopleandbusinessesfrom

climatechange-relateddamage.

Forprivatesectororganisations

?Protecthumancapital,businessoperationsandsupplychainsfromphysicaleffectsofclimatechange.

?Stayaheadofregulatoryrequirementstomeetnetzeroemissionsandclimateregulations.

?Enhancebrandandreputationwithclimateconsciouscustomersandotherstakeholders.

?Opportunitytorespondtoconsumer'shighermarketvalueofenvironmentally-mindedbrandswithhigherpricingandyields.

?Incorporateclimateandnaturerelatedfinancial

disclosuresresultinginimprovedESGperformance,suchas:

-AlignmentwithtargetsoftheTaskforcefor

ClimateRelatedFinancialDisclosure

(TCFD)

,a

private-sectororientedframeworkthatrequiresbusinessestoundertakefuture-scenarioalignedanalysisofclimaterisksandopportunities,thatisbecomingincreasinglymandated.

-AlignmentwithtoolssuchasPhysicalClimateRiskAssessmentMethodology(

PCRAM

)-whichprovidesguidelinesforintegratingphysicalclimaterisksin

infrastructureinvestmentappraisal.

?Demonstrateethicalchoicesandprovidesocialvaluebysupportingnaturalcapitalandthepreventionofenvironmentaldestruction,optimisingESGand

corporatereputation.

Forbuildingownersandoccupiers

?Strengthencommunityandsocialcohesionbycooperatingonresiliencemeasures.

-Reducedriskofdamagetopersonalproperty,

businessesornecessarysupportinginfrastructure.

-Heightenedwellbeing,comfortandreassuranceatcommunitylevel,particularlyduringweatherevents.

COSTOFINACTION

Thecostofinactiontorespondingtocurrentandfuture

climatechangeimpactswillbefeltfinanciallyaswellas

socially.Thedifferencebetweeninactiononclimatechangeandarapidtransitiontoresilienceisreportedlyworth$221trillionUSDtotheglobaleconomy

(DeloitteCenterfor

SustainableProgress)

.

?Atabuiltenvironmentlevel,delayedactiononclimateresilienceandadaptationwillseereducedbuilding

performance,resultinginsub-optimallivingand

workingenvironments.Thiscouldspiraltoaglobal

declineinhealthandwellbeing,heighteninginequalitiesandinjusticebetweenregions.

?Theincreasingquantityofseverityofextreme

weathereventswilllikelyleadtodamageofbuildingsandinfrastructure,withheightenedriskofstrandedassetsandhigherinsurancepremiumsforowners.

Estimatessuggesta$1.8trillionUSDinvestmentby2030inearlyresiliencemeasures(warningsystems,resilient

infrastructure,drylandagriculturalcropproduction,

mangroves,andwaterresourcemanagement)wouldyieldmorethan$7trillionUSDofbenefitsinavoidedcostsfromclimatechangeeffects

(BankofAmerica)

.Whereasthe

delayinimplementingmitigationandresiliencestrategiesiscostingtheglobaleconomyanadditional$0.3-0.9trillionUSDayear

(WorldHealthorganisation)

.

Formoreinformationaboutthevaluepropositionforasustainablebuiltenvironmentpleasevisit/business-case

4

BUILDING

Consultants

AcademicInstitutions

Governments

Contractors

Localcommunities

Developers

NGOs

Investors

Localcommunities

Policymakers

ProfessionalAssociations

Publicentities

Urbanplanners

Manufacturers

Owners/Occupiers

Suppliers

Architects

Contractors

Designers

Engineers

Investors

Landscape

Architects

Owners/Occupiers

Urbanplanners

KEYSTAKEHOLDERSINTHETRANSITIONTOARESILIENTBUILTENVIRONMENT

CITY

COMMUNITY&

NEIGHBOURHOOD

Theimpactsofclimatechangeanddamagefromextremeandgradualweathereventswilloccuratbuilding,community,cityandevennationalscale,thereforemeasurestomitigatedamageandensurerecoverabilitymustbeimplementedatsystemiclevel.

Toincorporateclimateresiliencestrategiesacrossaseriesofcomplexsystems,allbuiltenvironmentstakeholdersanddecisionmakerswillhavetoengageandtake

responsibility.Leadershipfromlocalandnationalgovernmentisessentialtoactivatemeaningfulresilienceandadaptationsolutions.

WORLDGREENBUILDINGCOUNCIL

WHATARETHECORECONSIDERATIONSFORTACKLINGCLIMATERESILIENCEINTHEBUILTENVIRONMENT?

5

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

Thefollowingsectionspresentprinciplesofbuiltenvironmentmanagementforchangestoweatherrelatedclimatechangeimpactssuchas:storms,highwinds,droughts,

floods,severetemperaturechange,and

wildfires.Theseprinciplesarefocused

onmeasuresofmitigationanddamage

protectionfromcontinualorgradualclimateimpactsandinsomecases,extreme

weatherevents.

However,largescalenaturaldisastersfromextremeweathereventsareoutsidethe

opportunitywindowfordesignorpolicy

interventions.Mostsuddenandextreme

weathereventscannotbemitigated

orlessenedinseveritywitheventhe

mostconscientiousdesignorplanning

interventions.Ultimately,buildinginareaswithknownriskofextremeweathereventsshouldbeavoidedatallcosts,suchas

floodplainsorlocationsathighriskof

wildfire.Unfortunately,asmillionsof

peopleworldwideliveinhigh-risklocations,measuresofsafety(suchasevacuation

ofpopulationduringdangerousweatherevents)andefficientbounce-backandrecoveryafterperiodsofdamagemustalsobeconsideredasimportantclimateresilienceconsiderations.

Formoreinformationonthis,pleaseseetheresourceliston

page1

9.

6

?Gatherenvironmentalanddemographic

dataassociatedwithclimatechange-collectappropriatedatatodevelopandfacilitate

adoptionofsustainabilityframeworksandmilestoneagendasthatenhanceresilience,suchasSendaiFrameworkforDisasterRiskReduction.

?Createresponsiveregulatorytoolbox

forgradualandextremeweatherchange

eventsthatenablesadaptationactivitiesacrossdifferentscalesandlevels.Putinplaceearly

warningsystems-commandandcontrolspaces-andemergencyresponseplanforextremeclimateevents.

?Setbuildingregulationsorguidelinesto

targetspecificclimaterisk,eg.guidelinesfor

betterbuildingscanreducestormdamage.Newbuildingstandardsshouldbeabletoberesilienttochangingextremeweatherconditions.

?Adoptlandusepoliciesandregulations

toreduce/preventdevelopmentinhighrisk

areas,andincentivisedevelopmentinlowerrisk

ones.

?Institutepoliciesandfinancial

incentives/penaltiestoincreaseresource

efficiency,suchaswaterconservation,andtoavoidunnecessaryrisks-suchasregulationforwoodburning,campfires,andbehaviouraroundflammablesubstancestoreducefirerisk.

?Advocateforshifttowardssustainable

behavioursthroughcampaignsandinitiatives.

WORLDGREENBUILDINGCOUNCIL

CITY

SCALEPRINCIPLES

foraresilientandadaptablebuiltenvironment

ADOPT

LEARN

?Assessmostvulnerablelocationstofocus

priorityinterventions-attentiontovulnerablelocations,particularlyinformalsettlements,andaspiretotransformslumsintohealthy,clean

andsafecommunities.

?Auditaccessibilitytovitalnaturalresources,

suchasfreshwater,andinvestinimprovementstoinfrastructuresystemstructures.

?Assesstheriskofclimatechangeonphysicalassetsandinfrastructureandsystemstressorsthroughfuturescenariomodellingandrisk

assessmentsthatconsiderthelifespanofanasset,includingriskofstrandedassets.

?Integrateindegenousknowledgeandresourcestohelpmonitorkeycomponentsofbiodiversity,supportsustainableuseofenvironmental

resourcesandenforceconservation

managementthroughindegenousvaluesystem.

?Supportsustainableandcircular

economyactivitiesthroughpublicprocurementandregulationofbuildingandconstruction

services.

?Planresilientanddecentralisedsystems

toimprovedatareconciliation,reducepointsofweakness,andoptimiseresourcedistribution.

7

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

ACT

?Protectnaturalcapitalandresourceswith

investmentinfrastructure-e.g.Prioritisegreeninginfrastructureandurbanarea,includingwildlife

corridors.Integrateblueandgreeninfrastructureintomunicipalurbanplanning.Managewater

operationstorescuethedepletionofavailablefreshwaterfrombuildingwastewater,includingmaintenanceofexistingwaterinfrastructure.

?Implementstrategicprotectionmeasures-suchasfloodpreventionmeasures,includingdamsandseawalls(favouringnature-basedsolutionsas

preferablesolutions).Createmorepublicandopengreenandbluespacesforbothnatureandpeoplewithincities,reducingurbanheatislandeffect.

?Prioritisesocialcohesionasessentialresiliencestrategy-enhancecollaborationbetweenlocalgovernment,communityandindustrytotacklelocalclimatechangethreats.

?Investinmaintenanceandenhancingexistingsystemstopreventavoidabledamagefrom

small-mediumscaleweatherevents,for

exampleimplementingsustainableinfrastructuredrainageandstorm-waterrunoffsolutionsatcityscale,maintainingsewerageandwatersystemsandimprovingrivercatchmentmanagementtopreventflooding.Buildinfrastructure,pavementsandroadswithmaterialsthataredurableand

withstandtemperaturechange.

?Provideguidancetoretrofitexistingbuilding

stocktoencouragepopulationstomake

manageablechangestotheirproperties,suchaspassiveshading,additionalinsulation,orstormproofing.

?Buildtransportroutesthatwillallowarapidresponsefromthesupplychaintotransportcriticalgoodsandcomponentsinemergencysituations.

Weneedtoputpeopleandnaturefirstinpursuitofaworldresilienttoclimate change-wherewedon’tjustsurvive climateshocksandstresses,butthriveinspiteofthem

8

WORLDGREEN

BUILDINGCOUNCIL

COMMUNITY&NEIGHBOURHOODSCALEPRINCIPLES

foraresilientandadaptablebuiltenvironment

ADOPT

?Collaboratewithmulti-disciplinaryandpublicentities,enablingfasterandmoreefficient

resilienceandadaptationactivitiesacrossthecommunityandneighbourhood.

?Putinplaceearlywarningsystems-commandandcontrolspaces-andemergencyresponseplanforextremeclimateevents.

?Adoptsustainablestrategiesandframeworks

thatfocusoncommuintyscaleplanning,

suchasadoptingnaturalcapitalbasedfinancialreportingtoencouragenature-basedsolutions.

?Undertakeassessmentsoflocalisedrisks

andopportunities(suchasnaturalcapital)

torecognisetheareasofvulnerabilityintheareaincludingriskstoinfrastructure.

?Conductdetailedassesmentofecologicalhealthintheareatokeepaneyeonclimaterisks.

?Integrateindegenousknowledgeandresourcestohelpmonitorkeycomponentsofbiodiversity,

supportsustainableuseofenvironmental

resourcesandenforceconservationmanagementthroughindegenousvaluesystem.

LEARN

9

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

ACT

?Protectandinvestinnaturalresources,such

asprotectingponds,lakes,andriversnearby

fromover-extractionandpollution,andinvestinginwaterstorageforemergencysituations.

Sustainabledrainagesolutionsandgreen

infrastructuretechniques,suchasplanting

moisture-lovingplantsandtreesandinstallingpermeablehardsurfacingtoabsorbexcess

waterthatcansupportresourcemanagement,forexamplebyallowinginfiltrationtosupportgroundwaterlevels.

?Considercommunityscalebuiltassetupgradesandretrofittoimproveresilienceofcommunityassetsincaseofsevereclimateevents,suchascommunitylevelmaster-planningtoimplementpassiveshadingtechniques,includingnarrow

streetstocreateshade,expandingurbantree

covertocombaturbanheatislandimpactsandfirebreakstoactasabufferbetweennaturalandresidentialzones.

?Increaseavailabilityofvegetationthatisresilienttoclimatechangeimpactstoallowfornature-

basedco-benefits,suchastemperature-durabletreestoprovideshadingandreduceurbanheat

islandeffect,aswellasdeeprootedtreesresistanttofloodsandstorms.

?Plancommunityemergencyhubsthatwillprovideaccesstosafespaceandservicesduringextremeweatherevents,andprioritiseestablishing

communityprotocolsandmaintainingevacuationpathways.

Theimpactsofclimatechange anddamagefromextremeandgradualweathereventswilloccuratbuilding,community,cityand evennationalscale,therefore measurestomitigatedamage andensurerecoverabilitymustbeimplementedatsystemiclevel

10

?Utiliseresilience-basedmeasurement

frameworksandreportingstandards,calling

foruserstoassessclimateriskandadopt

resilientandadaptivebusinessstrategiesbasedonfuturescenariomodellingoflikelyclimate

impacts.

?Selectmaterialsforappropriatenesstolikelyfutureweatherevents,prioritisingcircularityandlowembodiedcarbonmaterials.

?Adoptbackupstrategiesatbuildingscaleincaseofextremeweathereventssuchasoff-grid,decentralisedandresilientenergysupply.

ADOPT

LEARN

BUILDING

SCALEPRINCIPLES

foraresilientandadaptablebuiltenvironment

WORLDGREENBUILDINGCOUNCIL

?Preparetoundertakeadaptationmeasures

tochangingenvironmentalconditions,by

ensuringawarenessofpassiveandactive

retrofitmeasuresforbuildingsofalltypologiestoarangeofclimateimpacts.

?Beawareofsustainablesourcesofinvestmentandfinancingtoinvestinbuildingupgradesandretrofitsforincreasedresilienceanddurabilityagainstclimateimpactsandsevereweather

conditions.

?Assesstheriskofclimatechangeonphysicalassets,infrastructureandsystemstressors

throughfuturescenariomodellingandriskassessmentsthatconsiderthelifespanofanasset,includingriskofstrandedassets.

11

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

ACT

?Designtoprotect,collectandefficientlyutilisenaturalresources,suchasrainwatercollectionapparatus(eg.waterwellsandtanks,accuratelysizedtoprovideenoughstoragespaceindroughtperiods),grey-waterreusesystems,low-flow

amenitiesandwater-savingdevices,building

greenandblueroofs,orinstallingraingardenstomanagerainwaterrunoffwithadaptiveandnativevegetation.

?Implementpassivedesignandretrofit

techniques-tomitigateextremeheat-northerlyorientations,buildingoraddingsemi-permanentshadingdevices,deciduoustreeshading,shutters,lightcolourroofs,overhangsandutilisingthermalmass,andavoidlargevolumesofglazing(on

southornorth-facingaspectsandfacades

dependingontheglobalnorthorsouthregions),ortomitigateextremecold-captureresidual

heatwiththermoelectricgeneratorsandheat

exchangers,installpassivesystemsincluding

rooflightsandreflectivesurfacestoincreasesolargain,orincreaseairtightnessorwallcladdingandglazinginsulationandqualitytoreduceheatloss.

Protect,collectand

efficientlyutilisenaturalresourcesiskeytoa

resilient,sustainablebuiltasset

?Designfordurability,disassemblyand

maintenance,suchasplanningforclimate

appropriatestructuresandurbanlayoutsto

preventdamage,consideringtechniquesinwhichthebuildingcanwithstandfloods,fire,storms,

heatwaves,andotherclimatechangeevents.

?Guideenvironmentally-conscioususerbehaviour,

suchaspreventionoflitteroverflowtoavoid

cloggingofstormwatersystems,placinglow

retainingwallsmadefromstonesorlogsto

avoiderosionandtopsoil,utilisevegetationas

windbreakstoavoidtopsoilerosion,orinstallfansinsteadofairconditioningsystemsforlow-energycooling.

12

WORLDGREENBUILDINGCOUNCIL

PRINCIPLESINACTION

Applyingadaptation

SachinBhoite

DirectorofClimateResilience,ClimateSolutionsandNetworksC40Cities

solutionstoourcities

AVISIONFORRESILIENTCITIES

willensurethatthebuilt

environmentcontinues

toprotect,provideforand

connecturbancitizens,

despitechangingclimate.

13

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

Thedangerousconsequencesofclimatechangesuchasmorefrequentand

worseningdroughts,floodingandheatwavesarealreadyposinganexistentialthreatworldwide.

Thisisfeltacutelyinourlargestcities.Citiesareimportantinthisregard,notonlybecauseitiswhereamajorityof

peoplelive,butalsowherethemostimpactfulsolutions

couldbeimplemented.Applyingadaptationsolutionsto

ourcitieswillensurethatthebuiltenvironmentcontinuestoprotect,provideforandconnecturbancitizens,despiteachangingclimate.Proactiveclimateadaptationcan

alsodelivertransformativehealth,societalandeconomicbenefits.Mostadaptationinvestmentsservemultiple

purposesandquicklyprovideeverydaybenefitsfor

betterfunctioningcitiesandresilientcommunities.For

instance,strengthenedriverembankmentscanbeusedaspedestrianwalkways,cyclelanesorparks;nature-basedor‘green’adaptationsolutionsthatusevegetationtoreduceheat,droughtandfloodriskalsohelptoimproveairquality,environmentalconservationandcitizens’wellbeing,as

wellasabsorbinggreenhousegases.Reducingtherisksofdisastersalsoimprovespoliticalsecurityandhelpsreducecivilunrest,hungeranddisease,contributingtoastable

environmentforsocialandeconomicdevelopment.

Thesebenefitsoutweighthecostsofpotentiallossesbyafactoroffour,onaveragesomeleadingcitiesarealready

takinginnovativeaction.Wuhanispromotingecologicallyfriendlyalternativestotraditionalflooddefencesand

drainagesystemscity-widecalledspongecityfeatures.

Thesefeatureswillnotonlyworkonprinciplesofnature-

basedsolutionstoflooding(70%offloodwaterretention),butalsobringmultiplebenefitstothecityincludingcreatingcoolerenvironmentsandcreatingamenityspaces.The

15-minutescityconceptisbeingappliedthroughurban

planningglobally,fromBogotatoParis.Thisisnotonly

duetoitspositiveimpactstolocaleconomyandlife,butalsoimprovingresiliencetoclimateshocks.CitiesarealsoimplementingvariouslocalsolutionstotackleincreasingUrbanHeatIsland(UHI)effectbyLosAngelesinstalling

coolpaving,MelbourneplantingurbanforestsandCapeTownintroducingwaterspraysinpublicparks.

Adaptationisneededincitiesnow.Policymakers,industryandwiderstakeholderscanensureasafeandhealthy

futureincitiesbytakingfirmsteps,adaptationisembeddedinhowweplannewandretrofitexistingcities.Thisneedsbetterplanning,improvedpoliticalwillandfinancing

adaptationsolutionsthatcanmakeoursocietymoreresilienttoclimatechange.

14

C40ReinventingCitiesisaninnovative,

globalcompetitionthataimstodeliver

carbon-neutralandclimate-resilienturbanregenerationprojects.Thecasestudyis

oneofthe

33winners

oftheprojectwhichpresentsbestpracticeforclimateresilienceandadaptationinthebuiltenvironment.

Thefirstzero-carbonneighbourhoodofParis,theCollectiveforClimate,issituatedalongtheeasternbeltofParis

andspansover35hectares.Theprojectaimstoreduce

operationalandembodiedcarbonemissionsby85%

throughmultipleinnovativeapproachesandoffsetthe

project’smobility-relatedemissionsthrougha‘carbon

fund’.80%ofthesuperstructureisbuiltintimberorstone,and100%ofthefa?adesarecomposedofbio-sourced

materialssuchasterracottabricksandhemp.Interestingly100%ofthespaceswillbereversibleallowingtheprogramtochangeovertimeandadapttochangingneeds.

WORLDGREENBUILDINGCOUNCIL

CASESTUDY:

THECOLLECTIVEFORCLIMATE,PARIS,FRANCE

AdaptingtoExtremeHeat

Ambitioustargettoreduceambienttemperatureby3°C(Incomparisontothesamebuildingexcluding

vegetation/shading).Thisisachievedmainlythroughtheuseofbio-solarroofs.

7,000m2ofdedicatedgreenvegetationspace

ofwhichthemajority(5,350m2)isacombinationofgreenspaceonrooftopsoronbalconiestoreducetheheatislandeffectandtheremainderisgreenpublic

space.Theproject’svegetationischosentomaximizetheevapotranspirationofthesurroundingstolimittheheatislandeffect:

?80%oftheplantschosenarenativetoFrance.

?314treesaregrowninandaroundthesitedoublingthenumberoftreesonthesite.

?Bioclimaticdesigntomodelthequalityoftheoutdoorandindoorair,optimisingthechoiceoflocationoftheairintakes.

AdaptingtoDrought&WaterScarcity

Excessrainwaterisusedtowaterplantsleadingto

reducedpotablewaterdemandforirrigationpurposes.Improvementofwatersecuritythroughthecreationoffourcoolingoasestocomplementthepublicspace.

AdaptingtoFlooding

Semi-permeablecoveringsover100%ofthecatchmentareaallowrainwatertocollectandpassivelypermeateintotheundergroundwatertableinsteadofstraining

thesewagesystem.

15

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

16

servicesproject.8,800treesandpalmshavebeenplantedinthe30corridorsthatcover65hectares,aswellasmorethan90,000speciesoflesserplants.Abioclimaticstudyestimatedthatinjustonecorridor,thenewvegetation

growthwouldabsorb>160,000kgofCo2peryearfortheinitialphaseoftheplants’lives.Thestudy’s100-year

projectionisthatover2.3millionkgofCo2wouldbetakenupintheplants’biomass.

WORLDGREENBUILDINGCOUNCIL

CASESTUDY:

CORREDORESVERDES,MEDELLíN,COLOMBIA

AdaptingtoExtremeHeatandFlooding

Corridors)-aninterconnectednetworkofgreeneryacrossthecity-since2016.Thisambitiousinitiativeprovidesstrongclimateresiliencebenefits,alongsideimproving

urbanbiodiversity,reducingthecity’surbanheatislandeffect,absorbingairpollutants,andsequesteringasignificantamountofcarbondioxide.

CorredoresVerdesisanexcellentexampleofintegratingnature-basedsolutionsintothecity’sexistingmasterplan,anddemonstrateshowintegrated,nature-basedpoliciescanhaveafar-reachingimpactonthelocalandglobal

environment.Alongsidetheenvironmentalbenefits,theGreenCorridorsaresignificantlyimprovingcitizens’

livesandwellbeingaswellasprovidingsocialvaluetothecommunity,specificallyjobsforlocalcitizensfromdisadvantagedbackgrounds.

Medellín,thesecondlargestcityinColombia,

hascreated30‘CorredoresVerdes’(Green

Treesandvegetationprovideevapotranspirationand

shade,whichbothresultinlocalisedcooling.Linear

parksandgreencorridorsalsohelptoimproveurban

ventilation.Vegetationalsohelpstoreducetherisk

offlooding.TheseGreenCorridorsprovideMedellín

withahostofecosystemservices:theyhelptoreduceaveragecitytemperaturesby2°C,enablecarbonuptakeviaplantgrowth,captureparticulatematter(PM2.5)

toimproveairquality,andincreaseurbanbiodiversitythankstocreationofmorewildlife-friendlyhabitats.

Threeyearsaftertheprogramme’sbeginning,

Medellín’surbanheatislandeffecthasbeenreducedby2°C.Inspiteofclimatechange,cityofficialsexpectafurtherdecreaseof4-5°Cin28years’time.This

reversestheprevioustrendthatsawthecity’saveragetemperaturesin2010,6°Cabovewhatshouldhave

beenMedellín’saveragetemperature.

$16.3millionUSDhasbeeninvestedinthisecosystem

17

CLIMATECHANGERESILIENCEINTHEBUILTENVIRONMENT

C40

CTIES

18

WORLDGREEN

BUILDINGCOUNCIL

RESOURCESTOENHANCEACTION

WORLDGBC

NETWORKRESOURCES

GBCA:Resilienceinthebuiltenvironment-Understandingthetopic

GBCA:GreenStar-Ratingsystemsettingthestandardforhealthy,resilient,positivebuildingsandplaces

GBCFrance:Frameworkfordefiningresi