Ocean pollution is caused by the influx of industrial and domestic wastewater, oil spills from ships, and dumping of wastes into the ocean. Oil spills can cause fish and marine mammal deaths by shock or inhibited respiration, destroy mangroves and seaweeds, and damage marine ecosystems. Dumping of waste can lead to marine organisms accidentally swallowing trash, waste scattering on beaches and drifting at sea, and waste accumulating on the ocean floor. The influx of contaminated wastewater deteriorates marine organisms' immunity and can cause deformed organisms, as well as affect human health through consumption of contaminated fish and shellfish. International treaties aimed at addressing ocean pollution include the London Dumping Convention, MARPOL, UNC
2. Causes ● Influx of industrial water and domestic waste water. ● Discharge of oil from ships. ● Dumping wastes in the ocean.
3. Pollution caused by oil spill ● Fish's death from shock ● Marine mammal's inhibition of respiration ● Death of mangroves and seaweeds ● Destruction of marine ecosystem caused by the above problem ● Destroy the scenery ● Intake of carcinogen that stored up in marine organisms like fish
4. Pollution caused by dumping ・ Marine organisms's swallowing waste accidentally ・ Waste's scatter throughout beach ・ Waste drift around in the sea ・ Waste sink to the bottom of sea and accumulate there
5. Pollution caused by influx of industrial water and domestic waste water ・ Deterioration in marine organism's power of immunity ・ Appearance of deformed organisms ・ Effect on the human body through ingestion of fish and shellfish that contaminated with chemical substances
6. International treaties on ocean pollution ● London Dumping Convention (1972) ● MARPOL 73/78 (1973) ● UNCLOS (1982) ● OPRC Convention (1990)
