"Asformanyenvironmentalissues,regionalgovernmentssuchasstatesandprovincesplayaverylargepart,"saidKenAlex,directorofprojectclimateatUniversityofCaliforniaBerkeley'sCenterforLaw,Energy&theEnvironmentintheUnitedStates.

　　Thestrategywasfirstproposedin2011.Itisdesignedtosupplementthecountry'sgrowingsystemofprotectedareasbydefininglimitstohumanencroachmentonforests,wetlandsandotherpreciousecosystems,aswellasenforcingstrictconservationinthoseareas.

　　Nature-basedsolutionsrefertothepracticeofsustainablemanagementandtheuseofnaturalresourcestocombatclimatechangeandprotectbiodiversity.Someexamplesincludetherestoration,protectionandimprovedmanagementacrossforests,wetlands,agriculturalland,oceansandurbanspaces.

　　ButinCalifornia,whichhaslongstandingclimatetieswithChina,therealreadyhavebeenmanyexamplesofcooperationbetweenthetwosidestoboostbiodiversity.

　　TheexpertswerespeakinginadvanceofCOP15,the15thConferenceofthePartiestotheConventiononBiologicalDiversity,whichopenedinMontreal,Canada,onWednesday.Chinaisservingasthehostofthetalks,whichendonDec19.

　　AreasacrossChinaandCaliforniaarepioneeringnature-basedsolutions,accordingtotheCalifornia-ChinaClimateInstituteatUCBerkeley.ItservesasCalifornia'smainliaisonforinformation-sharingandcommunicationunderthememorandum.Theinstitutewaslaunchedin2019byBrown.

　　Chinahasimplementedanumberofnature-basedactivitiesoverthepast20years,expertsattheinstitutesaidinablog.Oneexampleofanature-basedsolutionlaunchedbyChinaistheEcologicalConservationRedlinesinitiative,expertssaid.

　　ThememorandumrenewedapriorversionsignedbyformerCaliforniagovernorJerryBrownin2018.

　　Forthefirsttimeatthebiodiversityconvention,therewillbeapavilionfocusedentirelyontheactionsofsubnationalandlocalgovernments,aswellastheopportunitiesavailabletothem.

　　China'sMinisterofEcologyandEnvironmentHuangRunqiuandCaliforniaGovernorGavinNewsommetinavirtualmeetinginApriltosignamemorandumofunderstandingtoadvancecooperationoninitiativestoachievecarbonneutrality,expandcleantransportationandacceleratenature-basedsolutions.

　　Lowertiersofgovernmentincountriesareplayinganimportantroleinboostingbiodiversity,expertssaidaheadofaUnitedNationsconferenceaimedatincreasingprotectionforthenaturalworld.

　　"CaliforniahasworkedwithChineseprovincesonmultiplematters,includingbiodiversity,creatingopportunitiesformutualbenefitsthroughscientificandpolicyexchange,"AlextoldChinaDaily."Asdevelopmentpressurecreatesnewchallengesforbiodiversity,cooperationandexchangeareessential.

　　"CaliforniaandChinahavebeeninsomediscussionaboutsharingbestpracticesandpotentiallyfundingnature-basedclimatesolutions,"saidEthanElkind,climateprogramdirectoratUCBerkeley'sCenterforLaw,Energy&theEnvironment.