Umbhobho wentsimbi engenanto luhlobo lwentsimbi ende ejikelezileyo, esetyenziswe ngokubanzi kwimibhobho yoRhwebo yeMizi-mveliso kwaye
Izinto ezenziwe ngoomatshini ezifana ne-petroleum, ishishini lekhemikhali, unyango, ukutya, ukhatywayo kunye nefani, ikhithi. Ubunzima bezinto ezibonakalayo zibonakala zibonakaliswa yidayimitha ye-indenti, enobuntu kwaye ilungele imibhobho yentsimbi enentsimbi enzima okanye enentsimbi enzima okanye ecekeceke.