zr-mssn vhcl (ZV) s vhcl tht ds nt mt xhst gs r thr plltnts frm th nbrd src f pwr. Th Clfrn dfntn ls dds tht ths nclds ndr ny nd ll pssbl prtnl mds nd cndtns. Ths s bcs ndr cld-strt cndtns fr xmpl, ntrnl cmbstn ngns tnd t prdc th mxmm mnt f plltnts. n nmbr f cntrs nd stts, trnsprt s ctd s th mn src f grnhs gss (GHG) nd thr plltnts. Th dsr t rdc ths s ths pltclly strng.