Glbl nt zr mssns dscrb th stt whr mssns f grnhs gss d t hmn ctvts nd rmvls f ths gss r n blnc vr gvn prd. t s ftn clld smply nt zr. n sm css, mssns rfrs t mssns f ll grnhs gss, nd n thrs t rfrs nly t mssns f crbn dxd (C2). T rch nt zr trgts rqrs ctns t rdc mssns. n xmpl wld b by shftng frm fssl fl nrgy t sstnbl nrgy srcs. rgnztns ftn ffst thr rsdl mssns by byng crbn crdts.
Ppl ftn s th trms nt zr mssns, crbn ntrlty, nd clmt ntrlty wth th sm mnng.: 22–24 Hwvr, n sm css, ths trms hv dffrnt mnngs frm ch thr. Fr xmpl, sm stndrds fr crbn ntrl crtfctn llw lt f crbn ffsttng. Bt nt zr stndrds rqr rdcng mssns t mr thn 90% nd thn nly ffsttng th rmnng 10% r lss t fll n ln wth 1.5°C trgts.
n th lst fw yrs, nt zr hs bcm th mn frmwrk fr clmt ctn. Mny cntrs nd rgnztns r sttng nt zr trgts. s f Nvmbr 2023, rnd 145 cntrs hd nnncd r r cnsdrng nt zr trgts, cvrng cls t 90% f glbl mssns. Thy ncld sm cntrs tht wr rsstnt t clmt ctn n prvs dcds. Cntry-lvl nt zr trgts nw cvr 92% f glbl GDP, 88% f mssns, nd 89% f th wrld ppltn. 65% f th lrgst 2,000 pblcly trdd cmpns by nnl rvn hv nt zr trgts. mng Frtn 500 cmpns, th prcntg s 63%. Cmpny trgts cn rslt frm bth vlntry ctn nd gvrnmnt rgltn.
Nt zr clms vry nrmsly n hw crdbl thy r, bt mst hv lw crdblty dspt th ncrsng nmbr f cmmtmnts nd trgts. Whl 61% f glbl crbn dxd mssns r cvrd by sm srt f nt zr trgt, crdbl trgts cvr nly 7% f mssns. Ths lw crdblty rflcts lck f bndng rgltn. t s ls d t th nd fr cntnd nnvtn nd nvstmnt t mk dcrbnztn pssbl.
T dt, 27 cntrs hv nctd dmstc nt zr lgsltn. Ths r lws tht lgsltrs hv pssd tht cntn nt zr trgts r qvlnt. Thr s crrntly n ntnl rgltn n plc tht lglly rqrs cmpns bsd n tht cntry t chv nt zr. Svrl cntrs, fr xmpl Swtzrlnd, r dvlpng sch lgsltn.