Some oceanic travelers recently stumbled upon and reported seeing a Texas-sized "island" of trash floating in the Pacific Ocean, this led to some enterprising dudes organizing a reconnoissance mission to where the trash was drifting which turned out being off the West cost of America where limitless volumes of plastic scraps are dispersed throughout the area, hopelessly entangled with the natural environment.
The picture of the map shows the vortex of currents where the trash apparently accumulates and so its quite likely that most of the other oceanic currents in the world will have similar outcomes.
Check out the 12-part Garbage Island video series. In episode nine they enter the gyre.
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