What is the biggest contamination of ocean water?

At the moment, the most powerful factors that pollute the waters of the world’s oceans are emissions into the ocean of waste that occurs when goods are transported by water, namely, the release of combustion products from ships and tankers into the open ocean.
In addition, recently there have been more frequent cases of pouring oil products into the ocean, which are transported by water transport.
The most important factor of pollution is the daily activities of people who live in coastal areas of oceans, seas and rivers. Because all the water from the current goes directly to the ocean.