This is because a reduction in the transport costs is of great importance for oil, and even more so for ores and other low-value bulk cargoes.
Le nto yenzeka kuba uphungulo kwixabiso lezothutho lubalulekile kakhulu kwi-oyile, kwaye ngaphezu koko kwinqanawa ze-oyile ekrwada kwakunye nezinye izithuthi mthwalo sambuku zodidi olusezantsi.