Sources of Marine pollution:
Two major ocean pollutants are :
- Chemical
- Trash
Minor pollutants are:
- Sewage waste, Hospital, Industrial discharge
- Thermal pollution
- Ocean mining
- Coastal tourism
- Ocean acidification due to acid rains.
- Volcanic Eruption
- Sedimentation
- Submarine nuclear test
- Atmospheric dust
Chemical Pollutants:
- Industrial chemical
- Agriculture chemicals such as fertilizer and pesticides
- DDT
- Some pollutants like nitrogen and phosphorous cause algae to bloom in the ocean which harms marine animals and tourism.
- Oil spills while shipping and drilling prevent sunlight to reach marine plants and prevent the photosynthesis process and the ultimate plant dies.
Trash:
- Plastics are the main pollutants in the trash category.
- Plastic pollution
Effects of ocean pollution:
- Depletion of oxygen content in water.
- Coral bleaching
- Algae bloom or Eutrophication
- Food chain disruption.
Try to solve the following questions:
- Give a critical account of the reasons and consequences of marine pollution. ( UPSC, 2014)
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