Kutheni iTunnels ziSebenzisa izibane zobungqina bokudubula

Ukudubula kweegesi ezinokutsha, njenge-methane, ziqhele ukwenzeka kwitonela. Imigaqo yolawulo lokhuseleko lolwakhiwo ifuna ukusetyenziswa kwezixhobo zokukhanyisa ezingaqhushumbayo.