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PLYMOUTH, ENGLAND - AUGUST 08: Volunteers collect plastic rubbish and waste washed up on the beach besides the University of Plymouth's Marine Station as they take part in a awareness-raising event organised by the all-female eXXpedition crew who are preparing to sail around Britain to highlight plastic in the oceans on August 8, 2017 in Plymouth, England. In a pioneering sailing expedition, starting and finishing at the University of Plymouth's Marine Station, a diverse group of women will collect water samples to measure for micro-plastics and other toxic chemicals, as well as hold events in the various ports that they sail to including Cardiff, Belfast, Arran, Stornaway, Edinburgh, London and Plymouth. (Photo by Matt Cardy/Getty Images)

PLYMOUTH, ENGLAND - AUGUST 08:  Volunteers collect plastic rubbish and waste washed up on the beach besides the University of Plymouth's Marine Station as they take part in a awareness-raising event organised by the all-female eXXpedition crew who are preparing to sail around Britain to highlight plastic in the oceans on August 8, 2017 in Plymouth, England. In a pioneering sailing expedition, starting and finishing at the University of Plymouth's Marine Station, a diverse group of women will collect water samples to measure for micro-plastics and other toxic chemicals, as well as hold events in the various ports that they sail to including Cardiff, Belfast, Arran, Stornaway, Edinburgh, London and Plymouth.  (Photo by Matt Cardy/Getty Images)

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Rubbish floating in Naifaru Harbour, Maldives, Indian Ocean, 25th January, 2015.

Rubbish floating in Naifaru Harbour, Maldives, Indian Ocean, 25th January, 2015.

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JEREZ DE LA FRONTERA, SPAIN - NOVEMBER 22: A man throws a plastic bottle onto a garbage heap during the 21st day of the garbage collectors strike on November 22, 2012 in Jerez de la Frontera, Spain. The garbage collectors will vote today on a compromise deal which saves the 123 jobs due to be cut in favour of reductions in saleries. (Photo by Denis Doyle/Getty Images)

JEREZ DE LA FRONTERA, SPAIN - NOVEMBER 22:  A man throws a plastic bottle onto a garbage heap during the 21st day of the garbage collectors strike on November 22, 2012 in Jerez de la Frontera, Spain. The garbage collectors will vote today on a compromise deal which saves the 123 jobs due to be cut in favour of reductions in saleries.  (Photo by Denis Doyle/Getty Images)

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Marine pollution

Marine pollution

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Overflowing bins in a park of Ciudad Universitaria, Madrid

Overflowing bins in a park of Ciudad Universitaria, Madrid