Vortex

Plastic ends up in a giant vortex (gyre) of rubbish in the sea.  The Great Pacific garbage patch, with 1/3 of all plastic in the oceans, is twice as big as the UK.  There are 4 other gyres: in the S Pacific, N Atlantic, S Atlantic and Indian Ocean

Guessed the Word?          Series 17 (1/7)             [pic: geralt]