Marine pollution can be defined as anything that contaminates the sea. Common marine pollutants include chemicals, small plastic beads in exfoliants and also toxic bio-matter (such as sewage). In this we talk about some major Marine pollution causes.
Top 6 Major Marine Pollution Causes:
Following are the major marine pollution causes are as fallow:
1. Toxic chemicals in water:
Chemical runoff from industry can really endanger marine life. Industrial waste pumped into the sea, household cleaners poured down the sink, and even chemicals in the atmosphere (for instance due to the discharge of industrial wastes through factory chimneys) that dissolve into the sea can pollute our oceans significantly.
2. Oil spills:
Ship pollution is a huge source of marine pollution, the most devastating effect of which is oil spills. Crude oil lasts for years in the sea and is extremely toxic to marine life, often suffocating marine animals to death once it entraps them. Crude oil is also extremely difficult to clean up, unfortunately meaning that when it is split; it is usually there to stay. So this is the main cause of marine pollution.
3. Plastic, Litter, and human waste:
Plastic bags, aluminum cans, trash and other human waste constitute a major pollutant of the world’s oceans. A huge ‘island’ of trash roughly the size of Texas was recently found in the Pacific ocean for instance, demonstrating the vast scale of this problem.
Whether or not it is treated with toxic chemicals, sewage pollutes the clear, clean water of the oceans. This is another type of industrial dumping. Sometimes, sewage is not pumped directly into the sea but into rivers, and then the untreated water of rivers carries it into the sea.
5. Land Runoff:
Land runoff is another source of pollution in the ocean. This occurs when water infiltrates the soil to its maximum extent and the excess water from rain, flooding or melting flows over the land and into the ocean. Often times, this water picks up man-made, harmful contaminants that pollute the ocean, including fertilizers, petroleum, pesticides and other forms of soil contaminants. Fertilizers and waste from land animals and humans can be a huge detriment to the ocean by creating dead zones.
6. Dissolved greenhouse gases:
Greenhouse gases from human fossil fuel consumption are making the sea more acidic.
If you want to read about marine pollution defination and its causes. You can read it here.