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Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions. London: Palgrave Macmillan. Correspondence: Nicole Darnall, School of Public Affairs and School of Sustainability, Arizona State University. Email: [email protected] Environmental purchasing in the City of Phoenix Nicole Darnall* Arizona State University Lily Hsueh Arizona State University Justin M. Stritch Arizona State University Stuart Bretschneider Arizona State University Abstract U.S. local governments purchase $1.72 trillion of goods and services annually that contribute to global climate change and other environmental problems. Cities that successfully implement environmental purchasing policies can mitigate these environmental concerns while saving money and demonstrating their environmental leadership. However, cities confront numerous challenges when implementing an environmental purchasing policy. This chapter identifies the facilitators and barriers of implementing an environmental purchasing policy. It draws on the experiences within the City of Phoenix as an example and offers eight recommendations for how the City of Phoenix and similar cities can integrate environmental purchasing more fully into their existing purchasing processes. Keywords: green purchasing, green procurement, environmental purchasing, sustainable purchasing, sustainable procurement, facilitators, barriers, implementation, public policy Background While the United States (U.S.) federal government withdrew from the Paris Climate Agreement, more than 372 U.S. mayors have committed to upholding the Agreement’s commitments to reduce greenhouse gases (U.S. Climate Mayors, 2017). One way some cities are fulfilling their commitments is through purchasing. U.S. cities purchase $1.72 trillion of goods and services annually (U.S. Census, 2016), accounting for between 25% and 40% of every state and local tax dollar spent (Coggburn, 2003). Purchased items include chemicals, electronics, furnishings, and office materials, which all contribute to global climate change and other environmental concerns during their production and use. These purchases together create a carbon footprint nine times that of buildings and vehicle fleets (U.S. General Services Administration, 2014). To mitigate these environmental impacts, some local governments have implemented environmental purchasing policies (EPPs). Also known as “environmentally sustainable purchasing policies” or “green purchasing policies,” EPPs improve cities’ internal efficiencies by reducing energy use, conserving water, and decreasing the frequency of certain purchases. They can also lead to cost savings while helping cities establish themselves as environmental leaders.

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Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

London: Palgrave Macmillan.

Correspondence:NicoleDarnall,SchoolofPublicAffairsandSchoolofSustainability,ArizonaStateUniversity.Email:[email protected]

Environmental purchasing in the City of Phoenix

NicoleDarnall*ArizonaStateUniversityLilyHsuehArizonaStateUniversityJustinM.StritchArizonaStateUniversityStuartBretschneiderArizonaStateUniversityAbstractU.S.localgovernmentspurchase$1.72trillionofgoodsandservicesannuallythatcontributetoglobalclimatechangeandotherenvironmentalproblems.Citiesthatsuccessfullyimplementenvironmentalpurchasingpoliciescanmitigatetheseenvironmentalconcernswhilesavingmoneyanddemonstratingtheirenvironmentalleadership.However,citiesconfrontnumerouschallengeswhenimplementinganenvironmentalpurchasingpolicy.Thischapteridentifiesthefacilitatorsandbarriersofimplementinganenvironmentalpurchasingpolicy.ItdrawsontheexperienceswithintheCityofPhoenixasanexampleandofferseightrecommendationsforhowtheCityofPhoenixandsimilarcitiescanintegrateenvironmentalpurchasingmorefullyintotheirexistingpurchasingprocesses.Keywords:greenpurchasing,greenprocurement,environmentalpurchasing,sustainablepurchasing,sustainableprocurement,facilitators,barriers,implementation,publicpolicy

Background

WhiletheUnitedStates(U.S.)federalgovernmentwithdrewfromtheParisClimateAgreement,morethan372U.S.mayorshavecommittedtoupholdingtheAgreement’scommitmentstoreducegreenhousegases(U.S.ClimateMayors,2017).Onewaysomecitiesarefulfillingtheircommitmentsisthroughpurchasing.

U.S.citiespurchase$1.72trillionofgoodsandservicesannually(U.S.Census,2016),accountingforbetween25%and40%ofeverystateandlocaltaxdollarspent(Coggburn,2003).Purchaseditemsincludechemicals,electronics,furnishings,andofficematerials,whichallcontributetoglobalclimatechangeandotherenvironmentalconcernsduringtheirproductionanduse.Thesepurchasestogethercreateacarbonfootprintninetimesthatofbuildingsandvehiclefleets(U.S.GeneralServicesAdministration,2014).

Tomitigatetheseenvironmentalimpacts,somelocalgovernmentshaveimplementedenvironmentalpurchasingpolicies(EPPs).Alsoknownas“environmentallysustainablepurchasingpolicies”or“greenpurchasingpolicies,”EPPsimprovecities’internalefficienciesbyreducingenergyuse,conservingwater,anddecreasingthefrequencyofcertainpurchases.Theycanalsoleadtocostsavingswhilehelpingcitiesestablishthemselvesasenvironmentalleaders.

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

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Becauseoftheirlargepurchasingpower,cities’eco-friendlypurchaseshavethepotentialtostimulatetheglobalproductionofgreenproductsandservices(UnitedNationsEnvironmentalProgramme,2012;LiandGeiser,2005).Theyalsocancreatesignificantmarketincentivesforcompaniestoreconsidertheirexistingproductionprocesses,incorporateenvironmentalprinciplesintotheirdailybusinessroutines,andreducetheirenvironmentalimpacts(Case,2004).Bylocalgovernmentsencouragingtheirsupplierstoproduceanddelivergreenerproductsandservices,anestimated40%ofthesecompanieswill,inturn,assesstheenvironmentalactivitiesoftheorganizationsthatsupplythem(Arimura,Darnall&Katayama2011).Cities’eco-friendlypurchases,therefore,havethepotentialtocreatespilloverbenefitsthatextendupthesupplychainandacrosstheglobe,leadingtosignificantenvironmentalbenefits.

However,mostU.S.citieshavenotadoptedanEPP(Darnalletal.,2017).CitiesthathaveanEPPoftenstruggletoimplementthemfully(SustainablePurchasingLeadershipCouncil,2016;Darnalletal.,2017).Asaconsequence,manycities–largeandsmall–havenotrealizedthefullpotentialoftheirEPPstowardsmitigatingtheirenvironmentalimpacts.Moreover,marketshavebeenslowtodevelopgreenproductsandservices.ThesearesignificantconcernsthattheUnitedNationsEnvironmentalProgramme,theInternationalCity/CountyManagementAssociation,theSustainablePurchasingLeadershipCouncil,andothershavesuggestedmustberesolvedifwearetomovetowardanenvironmentallysustainableeconomy.

CaseStudy–TheCityofPhoenixOneexampleofalargeU.S.citythathasexperiencedseveralchallengesimplementingitsEPPis

theCityofPhoenix,thestatecapitalofArizona.ItisthefifthlargestcityintheU.S.withapproximately1,615,017residentsin2016(U.S.Census2017a).ItissituatedintheU.S.’s12thlargestmetropolitanarea(U.S.Census2017b)andhasexperiencedsignificantgrowthinrecentyears.Between2010and2015itspopulationincreasedby32%(U.S.Census2017b).Thearea’sabove-averagegrowthisexpectedtocontinue(Forbes2015),withanincreaseof2.2millionresidentsby2030(WorldPopulationReview,2017)andadoublingofitspopulationby2050(CityofPhoenix,2014).Allthesefactorswillincreasedemandsoninfrastructureandincreasegreenhousegases.

Againstthisbackdrop,andinthelasttenyears,theCityofPhoenixhasexperiencedincreasesinrecordedweatherevents,suchasdrought,temperatureincreases,andheatwaves(U.S.ClimateChangeScienceProgram,2008).Rapidurbanizationhasextendedtheurbanheatislandeffectoverlargerareasandlongerseasons,raisingnight-timetemperaturesbyasmuchas10degreescomparedtoadjoiningnaturalareas(Wittlinger,2011).Thesequalityoflifefactorsaffectbusinesses’decisionstolocateorexpandtheiroperationsinthearea(CityofPhoenix,2014).

Respondingtotheseconcerns,in2016,thePhoenixCityCouncilapprovedthe“Phoenix2050EnvironmentalSustainabilityGoals.”Thegoalsconsistofsevenambitioussustainabilitytargets,andonelong-termambitionofbecomingcarbonneutralbyoperatingon100%cleanenergy(CityofPhoenix,2017a).Phoenix2050articulatesthecommunity’sdesiretobecomea“SustainabilityDesertCity”(CityofPhoenix,2017a).

TheCity’sChiefSustainabilityOfficerandtheCity’sAdministratoroftheOfficeEnvironmentalPrograms(OEP)believedthathavingastrongEPPwouldbecriticaltomeetingPhoenix’s2050sustainabilitygoals.BothCityofPhoenixleadersalsoagreedthatenvironmentalpurchasingcouldsavetaxpayersmoney.Asanexample,theCity’sOfficeofSustainabilitydeterminedthatiftheCitypurchased100,000energy-efficientstreetlightsandreplacedtheexistinginefficientbulbs,itcouldcutcarbonemissionsbyupto60%(CityofPhoenix,2017c).Thepurchasewasalsoestimatedto

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

London: Palgrave Macmillan.

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savetaxpayersupto$22millionthrough2030duetoenergysavingsandreducedmaintenancecosts(CityofPhoenix,2017b).EnvironmentalPurchasing

TheCity’sinterestineco-friendlypurchasingtookrootin2007whenthePhoenixCityCouncilpassedResolution20519.TheresolutiongrantedauthoritytotheCityofPhoenixtodevelopanEPPthat:

1. Integratedcontractprovisionsforsustainableproductsandservices,wherethecontractprovisionswereupdatedasnecessarytoaddresschangesintechnologiesorchangesinenvironmentalconditions.

2. Consideredthepurchaseofproductsandservicesthatachievedthebestvalue,whichconsistedofprice,performance,andenvironmentalcharacteristicsoverthelifecycleofaproductorservice.

3. Supportedmanufacturersandvendorswhoseservices,production,anddistributionsystemsreducedenvironmentalandhumanhealthimpacts.

4. Encouragedbuyersandconsumerstoadoptsimilarpoliciesandprograms(CityofPhoenix,2007).

TheCityofPhoenixdevelopeditsEPPin2012(CityofPhoenix,2012),althoughby2016,ithadnotbeenimplementedfully.ThechallengefacingtheCityofPhoenix(andmanyotherU.S.cities)washowtointegrateitsEPPintoitsexistingorganizationalstructureandpurchasingsystemsgivendecreasingbudgetsandgreaterfocuswithindepartmentsonlow-costpurchases.

Additionally,purchasingwithintheCityofPhoenixwasnotcentralizedwithinasingledepartmentbutdecentralizedwithinindividualdepartments.Whileeachdepartmenthadsimilarcorepurchasingprocedures,therewassignificantvariationregardingthetypesofpurchasesmade(e.g.routinevs.non-routine,lowcostvs.highcost).Departmentsalsovariedintheautonomytheygrantedtopurchasingofficers,inadditiontopurchasingofficers’levelofspecializationandtraining.

WhiletheseissuescomplicatedEPPimplementation,theCityofPhoenix’sOEPAdministratorbelievedthatimplementingtheCity’sEPPwasimportant.Hewasopentoinnovativeapproachesthatmightassist.ThissettingledtoapartnershipbetweenOEPandtheCenterforOrganizationResearchandDesign(CORD),aresearchcenteratArizonaStateUniversity(ASU)thatpromotes,supports,andconductsfundamentalresearchonpublic,nonprofit,andhybridorganizationsandtheirdesign.

TheCityofPhoenix/CORDpartnershiphadtwogoals:1. DeterminewhichfactorsimpedeandfacilitateEPPimplementationwithintheCityofPhoenix;

2. DeveloprecommendationsforhowtheCityofPhoenixcouldimproveEPPimplementation.

ResearchApproachToachieveitspartnershipgoals,incooperationwiththeCityofPhoenix,CORDresearchers

completedaseriesoffocusgroupswithCitypurchasingemployees.Thefocusgroupsallowedforthecollectionofqualitativedatainasettingthatwasdynamicanduser-driven(Mertonetal.,1956).Theyprovideda“safe”environmentforpurchasingemployeestodiscusstheCity’sEPP.CORDusedasemi-structuredinterviewtoleveragethegroupcontextandcreateinteractionamonginterviewees.Thisapproachwasparticularlyimportantgiventhecomplexityofpurchasingwithinthecityandthelackofinformationregardinghowpurchasingemployeesintegratedenvironmentalconsiderationsintotheirexistingpurchasingprocedures.

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CORDidentifiedfocusgroupparticipantswiththeassistanceofOEPandinterviewed14Phoenixpurchasingemployees(acrossfivedifferentdepartments).TheCityassembledparticipantsintothreefocusgroups.ThefirstgroupconsistedofpurchasingemployeeswithintheFinanceDepartmentandtheDeputyDirectorofFinance.ThesecondandthirdgroupsincludedacombinationofpurchasingemployeeswithintheWaterServicesDepartment,PublicWorks,Aviation,andtheConventionCenter.

Eachfocusgroupsessionlastedbetween75and90minutes.OneCORDresearcherservedasthefocusgroupfacilitator.Thisindividualraneachsessionandaskedthesameinterviewquestionstoeachfocusgroup.ThreeotherCORDresearcherstooknotes.Thenoteswerecontentanalyzedandassessedforthepresenceofmajorthemes.Contentanalysiswasthepreferredanalyticalmethodbecauseofitshigherlevelofrigorandlowerriskoferrorcomparedtoothertypesofinterviewanalyses(Krueger&Casey,2001).Sincethefocusgroupdiscussionswerenotaudiorecorded,thequotesofferedinthesectionsbelowmaynotbeverbatimandrepresentaparaphraseofthegroupdiscussion.

FacilitatorsofEnvironmentallyPreferredPurchasingDespitetheirdiverseworksettings,theCity’spurchasingemployeeswerefairlyconsistentin

theiridentificationofthedifferentEPPfacilitators.CORDresearchersfocusedonthetopfivemostfrequentlydiscussed,whichaccountedforapproximately96%ofthethemesemergingacrossallofthefocusgroupsessions(seeFigure1).Thefivefacilitatorswere:knowledgeaboutsustainablealternatives,costeffectivenessandfinancialincentives,e-procurementsystem,departmentculture,andexecutive-leveldirectives.Thepercentagesassociatedwitheachfacilitatorreflecttheproportionofthetotalcommentsrelatedtoeachtheme.Acrossallthefacilitators,reducingcostswasaunifyingconcerninthatfocusgroupparticipantsoftensuggestedthatsuccessfuleco-friendlypurchasesweregenerallymotivatedbycost-savings.

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

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1. KnowledgeofEnvironmentallyPreferredAlternatives(32%)ThemostcommonlymentionedfacilitatorfortheimplementationoftheCityofPhoenix’sEPP

wasknowledgeofenvironmentallypreferredoptionsoralternatives.Withlimitedresources,manyfocusgroupparticipantsexpressedthattheydidnothavethetimeorcapacitytoresearcheco-friendlyalternativesforproductrequests.However,accesstoinformationaboutthesealternativescanhaveasignificantinfluenceonpurchasingdecisions.Focusgroupparticipantsalsoemphasizedtheneedforgreatereducationaboutenvironmentallypreferredoptions.“Therearesomanyoptionsforsustainableproductsthatdepartmentsmightnotbeawareofthemall.Educationandvendorforumsmightbeagoodwaytodistributeinformationtothedepartments.”“Atalldepartmentlevels,peopledonotknowwhatsustainableproductsareoutthere,andtheproductoptionsarecontinuallychanging.Weareconstantlyplayingcatchup.”2. CostEffectivenessandFinancialIncentives(24%)

Thesecondmostwidelycitedfacilitatorthatfocusgroupparticipantsdiscussedwascosteffectiveness,includingfinancialincentives(e.g.,federalenergyrebates).Ifeco-friendlypurchasescangenerateimmediatecostsavings,participantsnotethatthetransactionismorelikelytotakeplace.FocusgroupparticipantsnotedthattheCityofPhoenix’s2050goalsincludesignificantwaste-reductionmeasuresthataremotivatedbycostreductions.Environmentalimpactreductionsareoftensecondaryconcerns.“TheCityhasanefficiencyinitiativethatwilldrivechange.Forexample,theCityeliminatedalldesktopprinters.Printingnowoccursfromcentralizeddepartmentprinters.Thechangehascausedstafftoprintlessandwehavefewerordersforcartridges,printers,andpaper.Allofthishashelpedcontrolcosts.”“InitiativesthataremostsuccessfularetheoneswheretheCitysavesmoney.”“TheCitygeneratesalotofwaste.Eco-friendlypurchasesthatareregardedasmoresuccessfulreduceenvironmentalimpactsbycreatingopportunitiestosellthewastetheygeneratetovendorswhotakeitawayandrecycleit.”

Likewise,focusgroupparticipantsreportedEPPimplementationisfacilitatedbyfinancialincentives,suchasfederalorstaterebateprogramsforenergyandwaterconservation.Someparticipantsstatedthattheypursuepurchasesthatconserveenergyprimarilytoobtaingovernmentrebates,thussavingtheCitymoney.Thefactthatthesepurchasesarealsoeco-friendlyisasecondarybenefit.“Wearereducingenergyusage.Iftheelectricutilityhasarebateprogram,wehaveadesignatedenergypurchasertolookatittoseeiftheCitycanqualifyandsaveadditionalresources.”3. E-procurementSystem(20%)

FocusgroupparticipantsmentionedtheCityofPhoenix’snewe-procurementsystemasapotentialfacilitatorforimplementingtheCity’sEPP.Theybelievedthate-procurementcouldbeleveragedasacatalogingtoolthatcentralizestransactionrecordsabouteco-friendlyproducts,thusallowingthecitytotrackitsenvironmentallypreferablepurchasingactivities.Participantsalsomentionedthatcouplingthee-procurementsystemwithinformationaboutecolabeledproductscouldfurtherfacilitateEPPimplementationbecauseitwouldreducetheeffortrequiredtoidentifyenvironmentallypreferredproducts.WhiletheCity’se-procurementsystemhadthiscapability,itwasnotbeingusedinthisway.Participantscitedalackoftrainingasthemainreasonthesystemhasnotyetbeenleveragedtopromoteenvironmentallypreferredpurchasing.“Ithinkthee-procurementhasthecapabilitytoallowyoutotrackgreenpurchases,butIamnotsureitiscurrentlybeingusedinthisway.”

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“Ourwholecontractingprocessisnew.Understandingitinvolvesasteeplearningcurve.Eventuallythereshouldbesustainablepurchasingcatalogs.Environmentalspecificationsshouldbeincludedortrackedintherequestforproposal(RFP)process.”4. DepartmentCulture(12%)

Thefourthmostcitedfacilitatorthatfocusgroupparticipantsmentionedwastheroleofmanagementtoelevateenvironmentalconcernsasaprioritywithintheirdepartment.Participantsemphasizedtheimportanceoftop-managementinestablishingadepartmentculturewhereemployeesareexpectedtoimplementtheCity’sEPP.“Managementhastotaketheleadandsetthetone.Thiswillhelpmaketheprogramsuccessful.”“Otherthanencouragingwaterconservation—sustainabilityisnotdiscouraged,butitisalsonotactivelyencouraged.”“Gettingusersonboardwouldfacilitateenvironmentalpurchasing.Thegeneralmentalityisthatpeoplewanttopurchasegoodsfastandcosteffectively.Purchasingemployeesneedtolearnmoreaboutgreenpurchasingoptions.However,thesesamepeopletendtowanttogetthingsdoneandidentifyingtheseoptionstakestimeandcomeswithtradeoffsthatarenotalwayssupportedatahigherlevel.Departmentmanagersneedtoprioritizeit.”5. Executive-levelDirectives(9%)

ExecutivemandatesorpurchasingdirectivesfromtheCityMayororCityCouncilwerealsodiscussedasimportantmotivatorsforimplementingtheCityofPhoenix’sEPP.Atthedepartment-level,purchasingemployeesagreedthatwhilecostistheimmediateconcern,departmentswillprioritizedirectivescomingfromexecutivemandates.Forexample,theCityhasamayoraldirectivethatgivespreferenceforpurchasesfromsmallbusinessenterprises.Evenifotherbidsaremorecompetitiveintermsofcost,purchasingprofessionalsmustfirstconfirmthatsmallbusinessenterprisesareunabletoprovidethesameproductorservice.FocusgroupparticipantsindicatedthathavingasimilardirectiveforenvironmentalpurchasingwouldhelpfacilitateEPPimplementation.“Environmentalpurchasingneedsauthorityfromthecouncilandmayor.ItneedspowerliketheCity’sOfficeofLocalSmallBusinessEnterprises.”“Purchasingemployeescan’ttelltheirdepartmentswhattodo.ToimplementEPPacrossdepartmentswehavetogetdirectionfromdepartmentleadershiporthemayor.”

WhileCityCouncilpassedaresolutionfortheCity’sEPPin2007manyoftheCity’spurchasingprofessionalswerenotemployedbytheCityatthetime.PurchasingemployeesnotedthatreaffirmationoftheCityCouncil’ssupportfortheCity’sEPPwouldhelpfacilitateimplementation.“WeneedtheEPPtobebackedbyCityCouncil.Itneedstostatethatthisisapriority.”

Challenges/BarriersofEPPImplementation InadditiontoidentifyingfactorsthatwouldfacilitateEPPimplementation,thefocusgroupdiscussionsrevealedthattheCityhadfivesignificantchallenges/barrierstoimplementingitsEPP,whichaccountedforapproximately97%ofthethemesemergingacrossallofthefocusgroupsessions(seeFigure2).Costwasanoverarchingconcernacrossallbarriers.1. PurchasingManagementStructure(26%)

ThefocusgroupparticipantsidentifiedthatthetopbarriertoimplementingPhoenix’sEPPwasthecomplexityandvariationinhowpurchasingwasmanagedbythedifferentdepartments.Somelargerdepartmentshadnearlyautonomouspurchasingunits,whileotherdepartments’purchasing

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proceduresweremanagedthroughtheFinanceDepartment.FocusgroupparticipantssuggestedthatthesevariationspresentedasignificantbarriertointegratingtheCity’sEPPacrossdepartmentsbecausetheycreateinconsistenciesacrossdepartmentpractices.“TheCity’sdepartmentsaregenerallysiloed,whichcreatesalotofvariationinhowdepartmentsoperate.TheAviationDepartmentmightgoaboutpurchasinginawaythatiscompletelydifferentfromotherdepartments.SmallerdepartmentsmightgetsupportfromtheFinanceDepartment,buttheystilldotheirownthing.Atahigherlevel,thereisalotofpushforpurchasingtousenegotiatedcity-widecontracts.”“InthePublicWorksDepartment,internalpurchasingpersonnelsupportallthepurchasingneedsforourdepartment,facilities,fleetmanagement,andsolidwaste.Forpurchasesabove$50,000,wecooperatewiththeFinanceDepartmenttoawardmostcontracts.However,allpurchasesbelow$50,000arehandledatthedepartmentlevel.”“Ourdepartmentisaffectedbynegotiatedcity-widepurchases.Centralpurchasingmanagesthesetransactions,andtheyreachouttotheotherdepartmentsforfeedbackpriortomakingthepurchase.However,forthesepurchasestobesuccessful,eachdepartmenthastoagreeontheproductorservice.Theprocessofreachingagreementmakesitdifficulttopurchaseanything—letaloneanythingsustainable.”

AnotherbarrierintheCity’spurchasingmanagementstructurewasrelatedtocoordinationbetweenOEPandtheotherdepartments,whichreducedtheinfluenceoftheCity’sEPP.OEPactedasanenvironmentalpolicyadvisorfortheCity.WhileOEPprovideddepartmentsinformationonenvironmentallypreferredproducts,itlackedauthoritytorequireEPPimplementation.Additionally,OEPwasnotalwaysincludedinstrategicdiscussionsatahigherlevel,whichmightleadtofurtherEPPintegrationandthecreationofincentivesthatwouldencourageCitydepartmentstopurchasegreenerproducts.

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“OEPneedstobeontheCity’steamfortheimplementationofstrategicpurchasing.Itneedsmoreleverageatahigherlevel.”“OEPneedstobeincludedontheCity’sstrategicteam.”2. PurchasingEmployees’ServicePriorities(22%)

ThesecondmostcitedbarriertoEPPimplementationwastheserviceprioritiesoftheCity’spurchasingemployees.PurchasingemployeesfeltconstrainedtoimplementtheCity’sEPPbecauseoftheirbeliefthatenvironmentallypreferredoptionsgenerallycostmoreintheshort-term,whichconflictswiththeirlimitedoperatingbudgets.Additionally,theyfeltrestrainedbytheirinternalclients’needforexpedientpurchasesbecausetheyreportthatittakestimetosearchforandidentifyeco-friendlyproductsalternatives.“Thechallengethatpurchasingemployeesfaceisthatweareoftenreactingtotheimmediateneedsofdepartments…Wearetryingtoexecuteapurchasequicklyanddon’thavetimetosearchforalternatives.”“Iamworkingontheclientsideofthepurchasing.Itrytofigureoutwhattheenduserneeds.Itrytogetthebestpriceandbestservice.Ihelpclientsdotheresearch—Ikeepaneyeonperformance,quality,andprice.”“Weexecute1,500-2,000contracts,400formalpurchasesperyear.Ourresponsibilityistoservethedepartmentsbygettingthemwhattheyneedquickly,bycomplyingwiththelaw,andsavingmoneyfortaxpayers.”3. ScopeofWork/TechnicalSpecifications(15%)

FocusgroupparticipantsidentifiedthatthethirdsignificantbarriertoEPPimplementationwasthescopeofwork/technicalspecificationsintheirRFPsandcontracts.Apriorityforpurchasingemployeeswastomeetthespecificationsanddemandsofthebid.Accordingtofocusgroupparticipants,environmentallypreferredproductsoftenhavetomeetahigherbar.Thatis,eco-friendlyproductsandservicesmustbecosteffective,andmeetor(moreoften)surpasstheperformanceofthecontract’stechnicalspecifications.Generally,thesetechnicalspecificationsfocusonproductperformanceandhavelittletodowithenvironmentalimpact.“Ithinkthebiggestpriorityformyworkistofulfiltheexpectationsoftheenduser.Someenvironmentallypreferredproductsdonotworkaswellasconventionalproducts.Sometimestheuserwilltryaproductanditjustdoesnotwork.Wehavetogetproductsthatmeettheend-user’sneeds.”“Itdependsonthepurchase.Incustodialservices,wecanwritetechnicalspecificationsthatrequiretheuseofproductsthathavelowerenvironmentalimpact.However,thecostandtheneedofthecustomermatters.”“Oneinstancewhereitwasbettertogowitharecycledproductwaswithrecycledtonercartridges.Departmentspushedforrecycledtonercartridgesintheirtechnicalspecificationsbecausethesecartridgesperformedaswellasnon-recycledcartridgesandwerecheaper.”4. BurdensofExecutive-levelDirectives(14%)

Thefourthbarrierwasrelatedtotheideathatwhilethedirectivesattheexecutive-level(Mayor,CityManager,CityCouncil)canserveasfacilitatorsofEPP,theywereproblematicbecausetheymighthavecompetedwithothermandates,suchastheLocalSmallBusinessEnterpriseProgram,whichprioritizessmallbusinessesincontracting.Competitionarisesbecausesmallbusinessesmaynothavethecapacitytoofferenvironmentallypreferredproductoptions.Focusgroupparticipantsalsoworriedthatexecutivemandatesforenvironmentalpurchasingmighthaveunnecessarilyconstraineddepartments.

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“Environmentalpurchasingmightnegativelyaffectthemayor’sLocalSmallBusinessEnterpriseProgrambecauselocal/smallbusinessesmaynotgetgreenproductsatlowprices.”“City-wideinitiativesofallsortsareachallenge.Theairportneeds24-houroperation—thiscreatesdifferentorganizationalneeds.Theairportmightneeddifferentvendorsthatmeetfederalsafetyrequirements.Also,theairporthasdifferentinsurancerequirementsfromvendors.”5. BudgetaryConcerns(10%)

Thefinalbarrierthatfocusgroupparticipantsdiscussedwasrelatedtobudgetaryconcerns.Departmentbudgetshadnotbeenstructuredtoconsiderlife-cyclecostsofpurchases.Thesecostsincludedavoidingrisktohumanhealth,disposalcostsafteraproductisused,andenergysavingsthataccrueovertime.Rather,theCity’sbudgetingprocessemphasizedtheimmediatecostofagoodorservice.ParticipantsacknowledgedthatthisposedasignificantobstacletoimplementingtheCity’sEPP,sincemanyeco-friendlypurchasescouldbejustifiedifconsideringthelife-cyclecostsofaproduct.“Inthecontextoflightbulbs,somepeoplewouldratherpaymoreoverthelongrunforinefficientlightbulbs.Ourusersareeducatedenoughtoseethevalue—butattheendoftheday,theywouldratherhavethenickeltodaythanadimetomorrow.”“Whenwearetryingtoswitchtogreenproducts,wehavetoconsiderbudget.Initialcostdrivesmostdecisions.”“Departmentdirectorslookattherestoftheyear’sbudgetatthreemonths.Iftherevenuesaren’tcominginastheyhadanticipated,theybeginlookingathowtocutthebudget.Whenthishappens,nooneisgoingtobuythemoreexpensiveLEDlightbulbevenifitsavesmoneyinthefuture.”“Whilethecityencouragesustopurchaseenvironmentalfriendlyproducts,thechallengehasbeencost—departmentshavetobalancebudgetsagainstsustainability.”

LessonsLearnedInsum,theCityofPhoenixfocusgroupparticipantssuggestedthatfivefactorshadthepotential

tofacilitatetheCity’simplementationofitsEPP:1. KnowledgeofEnvironmentallyPreferredAlternatives2. CostEffectivenessandFinancialIncentives3. E-procurementSystem4. DepartmentCulture5. Executive-levelDirectives

However,multiplebarriersexistedthatpreventedfurtherimplementation:1. PurchasingManagementStructure2. PurchasingOfficers’ServicePriorities3. ScopeofWork/TechnicalSpecifications4. BurdensofExecutive-levelDirectives5. BudgetaryConcerns

Recommendations

Drawingonthesefindings,CORDresearchersofferedeightcross-departmentalandcity-levelrecommendationstohelptheCityofPhoenixmorefullyintegrateitsEPPintoexistingpurchasingprocesses.

Recommendationsatthedepartment-levelincluded:

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

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1.ReinvigoratetheCity’sEPPTeamWhiletheCityhadan“EPPteam”consistingofpurchasingprofessionalsacrossdepartments

andpersonnelfromthePhoenix’sOEPitwasnotactive.TheCityshouldreinvigoratethisteamtoharmonizepurchasingpracticesandreduceinconsistenciesacrossdepartments.TheEPPteamshouldalsoworkwithpersonneltonegotiatecity-widepurchasestoensurethatcontractingmandatesare,toeveryextentpossible,linkedwithbudgetadjustmentsatthedepartmentlevel.Further,theEPPteamisadvisedtoensurethatcity-widepurchasesconsiderenvironmentallypreferredalternatives.

2.NetworktoShareBestPractices

TheEPPteamandPhoenix’sOEPshouldstrengthennetworkstosharebestpractices.ProfessionalnetworkssuchastheInternationalGreenPurchasingNetwork,ResponsiblePurchasingNetwork,andSustainablePurchasingLeadershipCouncilsupportgreenpurchasingacrossalltypesoforganizations.Theyhelpmemberssharebestpractices.ParticipatinginthesenetworkscanassistthePhoenix’sEPPteamandOEPprogramslearnadditionalwaystointegrateenvironmentalpurchasingintoexistingroutinesandprocesses,toidentifyinnovativesolutionsaroundgreenpurchasing,andtoenhancevendorrelations.ThesenetworkscanalsoinformtheCityofexternalsupport,suchasgrants,educationalprogramsandawards/recognitionsthatcanassistwithEPPimplementation.

3.BroadenRepresentationontheCity’sStrategicPurchasingTeam

TheCity’steamforstrategicpurchasingshouldbebroadenedtoincludetheOEPAdministrator.Doingsowouldensurethatenvironmentallypreferredpurchasingisconsideredinstrategicpurchasingcity-wide.RepresentationwouldalsoprovideimportantfeedbacktoOEPwithrespecttoissueswhichneedaddressinginordertofurtherintegrateenvironmentalconsiderationsintothepurchasingprocess.

4.ImplementEPPTraining

TheCityofPhoenix’sOEPshouldcoordinatewithotherdepartmentstoofferinternaltrainingonenvironmentallypreferredpurchasing.Trainingshouldbeofferedtobothpurchasingemployeesandcoverhowscopesofwork/technicalspecificationscanbebroadenedtoincludeenvironmentallypreferredproducts,howpurchasingemployeescanaccessinformationaboutenvironmentallypreferredalternatives,andhowlife-cyclecostsshouldbeconsideredwhendevelopingtechnicalspecifications.

5.IntegrateEcolabelInformationintoE-procurement

TheU.S.EnvironmentalProtectionAgencyhasidentifiedalistofmostpreferredecolabelstofacilitateeco-friendlypurchaseswithingovernment(USEPA,2017).ThislistisbasedonanindependentassessmentofprivatesectorenvironmentalperformancestandardsandecolabelsusingtheEPAGuidelinesforEnvironmentalPerformanceStandardsandEcolabels(USEPA,2017).TheCityofPhoenixshouldlinkitse-procurementsystemwiththislistsothatpurchasingemployeescanmoreeasilyidentifywhichproductsaremoreenvironmentallyfriendlythanothers.

6.ExpandLife-CycleCosting

OEPshouldexpanditsthelife-cyclecosting(LCC)ofproductsandlinkthesecoststodepartmentalbudgetswheneverpossible.LCCisaprocessofreviewingandevaluatingtheenvironmentalcostsofaproductthroughouttheproduct'sentirelife-cycle-from"cradletocradle"

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

London: Palgrave Macmillan.

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(USEPA2006).Forexample,energyefficientappliancescanbemoreexpensiveattheinitialpointofpurchasebutwillsaveenergy(andmoney)throughouttheappliancesworkinglife.LCCcanhelpidentifyproductsthatcomplywithtechnicalspecificationsandhavethelowesttotalcost.Moreover,usingLCCisconsistentwiththeCity’sEPPguidelinestoremainfiscallyresponsibleandcanprovidethebusinesscasetodepartmentsaboutthevalueassociatedwithpurchasingmoreenvironmentallyfriendlyproductsandservices.

Recommendationsforchangeatthecity-levelinclude:

7.DevelopanExecutiveDirectiveforEnvironmentallyPreferredPurchasingTheCityshoulddevelopanexecutive-leveldirectiveonenvironmentallypreferredpurchasing

similartoitsLocalSmallBusinessEnterprisedirective.Thisdirectiveshouldincludeareservecontractprogram,whereselectedgoodsandservicesarereservedforcompetitiononlyamongeco-friendlyproductsthatdemonstratesignificantreductionsinlife-cyclecosts.Amandateattheexecutive-levelwouldfosterastrongerdepartmentalculturearoundEPP,aswellasencouragegreaterinnovationandmovementatthedepartment-levelaroundgreenpurchasing.

8.CreateIncentivesforEPPImplementation

ThefinalrecommendationisthattheCityshouldcreateincentivesacrossalldepartmentsforimplementingitsEPP.Doingsowouldhelpcreateaculturethatencouragescreativityandrewardseco-friendlypurchasing.TheseincentivesshouldbemadeinconjunctionwiththeEPPTeamandincluderecognitionsforunits(orindividuals)thatuseLCCtoreducelong-runpurchasingcosts.Sinceinitialpurchasecoststakepriorityformostcitypurchases,departmentsshouldbegrantedlatitudetopurchasegoodsandgeneralservicesthatmayextendbeyondtheimmediatebudgetconstraintsbutwillsavetheCitysignificantresourcesovertime.Otherincentivesincludecompetitionsamongdepartmentsoracrosspurchasingcategoriestoreducelife-cyclecostsofpurchases.

Epilogue

InFebruary2017,CORDresearcherspresentedtheirrecommendationstotheCityofPhoenixAdministratorofOEPandtheCity’sDeputyFinanceDirector.ThepartnershipbetweentheCityandASUhelpedbuildmomentumaroundimplementingtheCity’sEPPbyengagingcriticalstakeholdersinthepurchasingprocess.InMarch2017,theOEPAdministratorstated:

“PhoenixwillusethefeedbacktoimprovetheCity’ssustainablepurchasingprogramandadvancetheCity’s2050environmentalsustainabilitygoals.Theresearch…willhelp[us]developaholisticprogramthatengagestheCity’sbuyerstoincreasegreenpurchasing,”(Newberry,2017).Sincethepartnership’scompletion,severalotherchangeshaveoccurred.Thefocusgroup

discussionshelpedOEPunderstandtheextenttowhichtheCity’spurchasingemployeesbelievedthateco-friendlyproductscostmorethantraditionalproducts.Inresponse,OEPhasenhanceditsLCCtoshowCityofPhoenixdepartmentsthatpurchasingeco-friendlyproductscanreducecostsoverthelifecycleoftheproduct(Faller,2017).Additionally,OEPhascontinuedmodifyingtheCity’se-procurementsystemtomakeiteasiertobuyenvironmentallypreferableproducts(Faller,2017).

Insummer2017,theCitybegantoreviseitsEPPtoprovidemoreguidancetoCityofPhoenixpurchasingemployeessothateco-friendlypurchasingcanbeexecutedmoreeasily.Aspartofthisrevision,OEPbegantobroadenitsEPPtoincludethesocialaspectsofpurchasinginanew“SustainablePurchasingPolicy”(SPP).TheCity’sevolvingSPPincorporatesseveralpurchasingprogramsthatpreviouslyexistedoutsideofOEP,suchastheCity’sfocusonpurchasingfrom

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

London: Palgrave Macmillan.

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minority-ownedbusinesses,women-ownedbusinesses,andlocally-ownedbusinesses.AlltheseeffortswillhelptheCitymeetitsPhoenix2050sustainabilitygoalsanditsmorerecentcommitmenttoupholdtheprovisionsoftheParisClimateAccord(Gardiner,2017).

FurtherReading

DarnallN,StritchJM,BretschneiderS,HsuehL,DuschaM,IlesJ,NoW,SuarezJ,BurwellC.2017.AdvancingGreenPurchasinginLocalGovernments.Phoenix:ArizonaStateUniversity,CenterforOrganizationResearchandDesign,SustainablePurchasingResearchInitiative.

DarnallN,StritchJM,BretschneiderS,HsuehL,NoW.2017.Goinggreenonpurchasing:eightpracticestoreduceenvironmentalimpacts.PublicManagementMagazine,August27,p.28-29.

Gardiner,D.2017.MayorGregStanton:despiteU.S.withdrawal,PhoenixwillsupportParisclimatepact.AZCentral,June1.azcentral.com/story/news/local/phoenix/2017/06/02/mayor-greg-stanton-despite-u-s-withdrawal-phoenix-support-paris-climate-pact/363450001/,lastaccessed5September2017.

NotesonContributors

NicoleDarnallisaprofessorofmanagementandpublicpolicyatASUintheSchoolofPublicAffairsandtheSchoolofSustainability.SheisassociatedirectorofASU’sCORDandteamleaderoftheSustainablePurchasingResearchInitiative(SPRI).Herresearchfocusesonfactorsthatfacilitateorimpedetheenactmentoforganizationalsustainabilityandindividuals’sustainabilitybehaviors.LearnmoreaboutSPRI’sresearchatspa.asu.edu/spri.

LilyHsuehisanassistantprofessorofpublicpolicyatASU’sSchoolofPublicAffairs.SheisaCORDSeniorAffiliate,andSeniorSustainabilityScientistatASU’sJulieAnnWrigleyGlobalInstituteofSustainability.Herresearchfocusesontheemergence,evolution,andimpactsofvoluntaryprogramsandmarket-basedpoliciesacrosspolicyissueareas,suchasclimatechange,toxicchemicals,oceanandmarineresources,andsustainablepurchasing.

JustinM.StritchisanassistantprofessorofpublicmanagementatASU’sSchoolofPublicAffairs.HeisCORDSeniorAffiliateandResearchFellowatSFI-TheDanishNationalCentreforSocialResearch.Hisresearchfocusesonemployeemotivation,management,performance,anddecision-makinginpublicorganizations.Heappliesthesetopicstoavarietyofsettings,includinghoworganizationscanencourageworkplaceparticipationinpro-environmentalbehavior.

StuartBretschneiderisFoundationProfessorofOrganizationDesignandPublicAdministrationatASU’sSchoolofPublicAffairsandCORD’sDirectorofResearch.Hisresearchfocusesoninnovationinpublicorganizations,theuseofinformationtechnologyandtheeffectsofthosetechnologiesonpublicorganizations,andtheevaluationofenvironmentalandenergypolicies.

Acknowledgements

TheauthorsthanktheCityofPhoenixfortheopportunitytoundertakethisresearchandtheV.KannRasumussenfoundationforitsfinancialsupport.

ReferencesArimuraT.H.,DarnallN.,KatayamaH.2011.IsISO14001agatewaytomoreadvancedvoluntaryaction?Thecaseofgreensupplychainmanagement,Journalofenvironmentaleconomicsandmanagement61(2),170-182.

CaseS.2004.Policyupdatesinspireenvironmentalpurchasing.AmericanCity&County02-13-2014.

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

London: Palgrave Macmillan.

13

CityofPhoenix.2017a.EnvironmentalSustainabilityGoals.https://www.phoenix.gov/sustainability,lastaccessedAugust30,2017.

CityofPhoenix.2017b.InitialphaseforLEDstreetlightconversionworkbeginsAugust14.phoenix.gov/news/streets/1786,lastaccessedAugust30,2017.

CityofPhoenix.2017c.LEDstreetlightprogram.phoenix.gov/streets/neighborhood-matters/street-light-information/led,lastaccessedAugust30,2017.

CityofPhoenix.2014.Developmentof2050sustainabilitygoalsandtargets.EnvironmentalQualityCommission,November20,phoenix.gov/oepsite/Documents/Sustainability%202050%20Goals%20Presentation%20%2011.20.14.pdf,lastaccessedSeptember1,2017.

CityofPhoenix.2012.PhoenixEPPPolicy.https://www.phoenix.gov/oepsite/Documents/070520.pdf,lastaccessedAugust30,2017.

CityofPhoenix.2007.Resolution20519.AResolutionoftheCityofPhoenixonEnvironmentallyPreferablePurchasing.https://www.phoenix.gov/oepsite/Documents/031916.pdf,lastaccessedAugust30,2017.

Coggburn,J.D.2003.ExploringdifferencesintheAmericanStates’procurementpractices,JournalofPublicProcurement3(1),3-28.

DarnallN,StritchJM,BretschneiderS,HsuehL,DuschaM,IlesJ,NoW,SuarezJ,BurwellC.2017.AdvancingGreenPurchasinginLocalGovernments.Phoenix:ArizonaStateUniversity,CenterforOrganizationResearchandDesign,SustainablePurchasingResearchInitiative.

Faller,MB.2017.ASUinitiativehelpingcitiestobecomemoresustainable.ASUNow.July6.ui.asu.edu/content/asu-initiative-helping-cities-become-more-sustainable,lastaccessedAugust31,2017.

Forbes.2015.America’sfastestgrowingcitiesin2015.forbes.com/pictures/emeg45eegeg/11-phoenix-ariz-3/#1dfdd43f15b7,lastaccessedAugust30,2017.

Gardiner,D.2017.MayorGregStanton:despiteU.S.withdrawal,PhoenixwillsupportParisclimatepact.AZCentral,June1.azcentral.com/story/news/local/phoenix/2017/06/02/mayor-greg-stanton-despite-u-s-withdrawal-phoenix-support-paris-climate-pact/363450001/,lastaccessed5September2017.

Krueger,RichardE.andMaryCasey.2001.“DesigningandConductingFocusGroupInterviews.”SocialAnalysis:SelectedToolsandTechniques.WorldBank,SocialDevelopmentPapers.PaperNumber36:4-23.

LiL.andGeiserK.2005.Environmentallyresponsiblepublicprocurement(ERPP)anditsimplicationsforintegratedproductpolicy(IPP).JournalofCleanerProduction13,705-715

Merton,RobertK.,Fiske,Marjorie,andKendall,PatriciaL.1956.TheFocusedInterview.Glencoe,IL.TheFreePress.

Newberry,B.2017.ASUresearchinformscityofPhoenixoneco-friendlybuying.ASUNow.March3,2017.

SustainablePurchasingLeadershipCouncil.https://www.sustainablepurchasing.org/.Lastaccessed30August2017.

U.S.CensusBureau.2016.StateandLocalGovernmentFinancesbyLevelofGovernmentandbyState:2013-2014,https://www2.census.gov/govs/local/14slsstab1a.xls,lastaccessedAugust30,2017.

U.S.Census.2017a.CommunityFacts.Selected:Philadelphiacity,Pennsylvania;Phoenixcity,Arizona;Houstoncity,Texas;Chicagocity,Illinois;LosAngelescity,California;NewYorkcity,NewYork.https://www.census.gov/quickfacts/fact/table/philadelphiacitypennsylvania,phoenixcityarizona

Forthcoming in Garren, S., Brinkman, R. (eds.) Handbook of Sustainability: Case Studies and Practical Solutions.

London: Palgrave Macmillan.

14

,houstoncitytexas,chicagocityillinois,losangelescitycalifornia,newyorkcitynewyork/PST045216,lastaccessedSeptember22,2017.

U.S.Census.2017b.CommunityFacts.EstimatesofResidentPopulationChangeandRankings:July1,2015toJuly1,2016-UnitedStates--MetropolitanStatisticalArea;andforPuertoRico,2016PopulationEstimates.

U.S.ClimateChangeScienceProgram.2008.WeatherandClimateExtremesinaChangingClimate.T.R.Karl,etal.(eds.).DepartmentofCommerce,NOAA’sNationalClimaticDataCenter,Washington,D.C.

U.S.ClimateMayors.2017.372USClimateMayorscommittoadopt,honorandupholdParisClimateAgreementgoals,medium.com/@ClimateMayors/climate-mayors-commit-to-adopt-honor-and-uphold-paris-climate-agreement-goals-ba566e260097,lastaccessedSeptember5,2017.

U.S.EnvironmentalProtectionAgency(USEPA).2006.LifeCycleAssessment:PrinciplesandPractice.Washington,DC:USEPA,NationalRiskManagementResearchLaboratory,OfficeofResearchandDevelopment.

U.S.EnvironmentalProtectionAgency(USEPA).2017.EPA'sRecommendationsofSpecifications,Standards,andEcolabelsforFederalPurchasing.https://www.epa.gov/greenerproducts/epas-recommendations-specifications-standards-and-ecolabels-federal-purchasing.Lastaccessed30August2017.

U.S.GeneralServicesAdministration.2014.RemarksbyGSAAdministratorDanTangherliniatSPLC’s2014Summit.https://www.sustainablepurchasing.org/blog/2014/05/24/remarks-by-gsa-administrator-dan-tangherlini-at-splcs-2014-summit/,lastaccessed30August2017.

UnitedNationsEnvironmentalProgramme.2012.TheImpactsofSustainablePublicProcurement:EightIllustrativeCaseStudies.Paris:UnitedNationsEnvironmentalProgramme.

Wittlinger,S.2011.Theurbanheatisland:jeopardizingthesustainabilityofPhoenix.PolicyPoints3(3),1-3.

WorldPopulationReview.2017.PhoenixPopulation2017.worldpopulationreview.com/us-cities/phoenix-population/,lastaccessedAugust30,2017.