There is also concern with the amount of allowed pollution of the sea bed under farms by faeces and waste food and the shooting of predator seals.

BBC: How can Scotland cope with China's salmon demands?

The Irish Government has put pressure on Britain to close the Cumbrian plant because of fears of the risk of radioactive pollution spreading across the Irish Sea.

BBC: Low level radiation in salmon

Population increase, over-consumption and galloping urbanisation have multiple consequences, including the increasing rarity of certain species of plants and animals, pollution, the over exploitation of land and the sea, as well as the spread of invasive alien species.

UNESCO: MEDIA SERVICES

The MCA, which is now investigating the source of the pollution, said under maritime pollution regulations and "stringent conditions" PIB can be released into the sea in "very, very small concentrations".

BBC: Richard Drax MP to question government over bird pollutant

The pact is designed to place fishing rights, deep-sea mining, global pollution and more under the control of a new global bureaucracy, with disputes adjudicated by a new world court.

CENTERFORSECURITYPOLICY: Bottom-of-the-sea treaty

Sea level rise, the loss of biodiversity, acidification and pollution are only a few dangers threatening our seas and coasts.

UNESCO: Intergovernmental Oceanographic Commission

The aim of the study was to compare two groups of animals that lived during periods when sea ice extent and pollution levels were very different.

BBC: 'Stress' is shrinking polar bears