This in turn requires higher building costs, so that polar cargo ships will be considerably more expensive than conventional cargo ships.
Le nto ke okulandelayo ifuna izakhiwo eziphezulu ezibizayo ukwenzela ukuba iinqanawa ezinomthwalo ezikwincam yomhlaba ziqwalaselwe ngexabiso elibizayo kunenqanawa zomthwalo eziqhekekileyo.