How did nanoplastics end up at the North and South Pole?
Researchers identify plastic particles in Arctic ice dating back to 1960s
For the first time researchers have identified the presence of tiny polluting plastic particles at both of the world’s polar regions.
Microplastics have previously been found in Arctic ice samples, but “it turns out there’s an even smaller and more toxic form of plastic pollution infiltrating remote reaches of the globe”, said Eco Watch.
Nanoplastics have often “escaped attention” from research into polar plastic pollution, said a team from Utrecht University in their paper, published in the Environmental Research journal. Nanoparticles are invisible to the naked eye, and can’t be detected through standard scientific sampling and measuring processes.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
Instead studies have generally focused on microplastics, which measure between one micrometre and five millimetres and are known to cause a number of environmental problems and disrupt marine ecosystems. Nanoparticles, which are often the byproduct of microplastics breaking down in natural environments, measure less than one micrometre in size.
The research team analysed samples from the Earth’s most remote regions, the Greenland ice core and the Antarctica sea ice core. They identified six types of plastic nanoparticles present in the first, including dust from tyre wear, and three in the second. The volume of particles found indicates “that the tiny particles are now pervasive around the world”, said The Guardian.
Polyethylene was the most common particle found in the samples, accounting for more than half the total particles analysed. It is one of the most commonly used plastic materials in the world, and is used to manufacture household items including bin bags, plastic films and bottles.
“Nanoplastics is really a bigger pollution problem than we thought,” said Dusan Materic, who led the project. The data also suggests that this “is not a new problem”. The Greenland core contained nanoplastics that indicated this type of pollution had been “happening all the way from the 1960s. So organisms in that region, and likely all over the world, have been exposed to it for quite some time now,” he exaplined.
It is generally understood that nanoparticles are easily carried long distances by the wind due to their light weight. The researchers concluded that the nanoplastics likely reached the North and South Pole regions through a “combination of complex processes including both atmospheric and marine transport, (re)emission, deposition and ice incorporation”. They concluded that the particles likely reached Greenland through the air, and Antarctica through ocean currents.
“Plastics are part of the cocktail of chemical pollution that pervades the planet,” said The Guardian. A study published by scientists at the Stockholm Resilience Centre last week said that the level of synthetic chemicals in the Earth’s ecosystems has now exceeded the planetary boundary for environmental pollutants.
And nanoparticles could come with serious health risks too. Pollution expert Dr Fay Couceiro told The Guardian: “Aside from the environmental damage caused by plastics, there is growing concern about what inhaling and ingesting microplastics is doing to our bodies.”
Though research into the specific risks of nanoparticles is ongoing, they are known to be toxic to both marine organisms and humans. “Nanoplastics are very toxicologically active compared to, for instance, microplastics, and that’s why this is very important,” said Materic.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
-
Antarctica: is coldest continent heading for chaos?
In the Spotlight China and Russia signal new scramble for control of the resource-rich region
By The Week UK Published
-
Mushrooms and urine – the strange solutions to our plastic problem
The Explainer Over 30% of plastics are single-use prompting imaginative alternatives
By Chas Newkey-Burden, The Week UK Published
-
Ottawa climate talks: can global plastic problem be solved?
In the spotlight Nations aim to draft world's first treaty on plastic pollution, but resistance from oil- and gas-producing countries could limit scope
By Harriet Marsden, The Week UK Published
-
EPA limits carcinogenic emissions at 218 US plants
Speed Read The new rule aims to reduce cancer-causing air pollution in areas like Louisiana's 'Cancer Alley'
By Peter Weber, The Week US Published
-
How billions in taxpayer dollars fuel pollution from plastics
Under the Radar At least 50 plastic plants have been built or expanded in the United States over the last decade
By Justin Klawans, The Week US Published
-
The push for net zero
The Explainer Britain has committed to reaching net-zero carbon emissions by 2050. What will this involve?
By The Week Staff Published
-
Poor pollution regulation (still) impacts the lives of Gulf Coast residents
Under the Radar Many people in the region are experiencing health problems as a result of nearby refineries
By Justin Klawans, The Week US Published
-
Under Antarctic ice lies a hidden landscape
Speed Read Climate change may reveal it over time
By Devika Rao, The Week US Published