It has been estimated that even now about 2 million tons of oil per year are introduced into the sea as a result of shipping activities and oil recoveries in Continental Shelf regions Should a tanker become a casualty or a drilling rig suffer an accident, the quantities spilled in the short term are often quite considerable.
Iqikelelwa nangoku ukuba malunga nezigidi ezimbalwa, ezimbini zeetoni ze-oyile ngonyaka zichazwa elwandle ngenxa yeziphumo zemisebenzi yoshishino kunye nokufunyanwa kwe-oyile kumimandla efihlakeleyo yamazwe xa isithuthi sithe safumana ingxaki okanye ukuziqhelanisa nokusokolana nengozi impahla ezichithekayo kwixeshana elincinci liyaqwalaseleka