Where Is The Biggest Garbage Dump On Earth?

Plastic Ocean by United Nations

There are five gyres in the world: north and south of the Atlantic Ocean, north and south of the Pacific Ocean and Indian Ocean.
These high pressure gyres are created by weather systems where atmosphere builds up like a mountain, and the heavier weight of atmosphere pushes down on the ocean’s surface, that creates the pressure near the center.

Hawaii is in the North Pacific Central Gyre (Eastern garbage patch).

United Nations Environment Programme
https://www.unenvironment.org/