FacebookTwitterRedditEmail

The Microplastic Threat

When Chelsea Rochman at the University of Toronto and colleagues began their study on medakas (small Japanese rice paddy fish), they did not expect to find what they did.

They first soaked ground-up polyethylene in San Diego Bay for three months and then fed it to these fish along with a laboratory diet.  They also fed the same diet to a comparison group of medakas but along with virgin polyethylene also ground-up.  The medakas eating the plastic immersed in the Bay suffered greater liver damage.  How much of a danger then is our seafood?

Defined as less than 5mm in size,  microplastics have been found in 114 types of aquatic life, over half of which are consumed by humans.   Oysters exposed to food-container plastic (polystyrene) have fewer eggs and impaired less-motile sperm.  Does eating them do the same to us?  Nobody knows.  A comprehensive study of plastics in seafood and its implications for human health points to the gaps in our knowledge.  It calls for more research into the toxicity of various plastics and in identifying lower risk seafood.

There is some evidence for the quantity of microplastic pieces per cubic meter of water — from the surface to a depth of 1000 meters in one study.  The numbers range from four pieces at the surface increasing to about a dozen at 200 meters down then declining to three or so at a 1000 meters down.  It is certainly not super dense.  At the same time, little fish ingesting it and bigger fish eating smaller ones, and one can see a problem developing, particularly for us the final consumer.

The copious plastic debris flowing into the ocean estimated at 8 million tons annually continues to add to the 100 million tons already there.  Engineering experts at Stanford University have discussed “the potential for meaningful change” in the status quo.  They have some interesting observations:  Microplastics are now in “about a quarter of the sea foods in our markets and even in table salt.”  They are also in “94 percent of tap water samples in the US and in nearly every brand of bottled water.”  At this we checked tap water and some bottled water and did not notice any.  Insidious, if these are microscopic.

Research in other parts of the world exemplify the global extent of the microplastics menace.  In a study of commercial fish caught off the Portuguese coast, microplastics were found in 19.8 percent of the 26 species of fish tested.  Plastic polymers, polyethylene and polypropylene as well as fibers like polyester, rayon and nylon had been ingested.  As might be expected, the fish taken off Lisbon and its environs were worst affected.

In another study, fish and bivalves taken from markets in California and Makassar, Indonesia were  examined for anthropogenic debris.  Plastic was again confirmed in seafood sold for human consumption.  Debris was found in about a quarter of individual fish and a third of shellfish raising concerns about human health.

North Sea fish have been studied for plastic ingestion also.  Foekema and his fellow researchers found particles up to 4.8 mm in five of seven common North Sea fish species.  Usually only one particle was found and in only 2.6 percent of the 1204 individual specimens tested.  Cod showed the highest frequency with one third involved.  In another study of 400 individual fish from four species, only two particles were found, both in one individual, a sprat, confirming the relative low incidence of plastics in North Sea fish.  The particles in the sprat were microbeads.

Then there is the ubiquitous cigarette butt.  Is there something prophetic about dropping and stubbing it as the final act of a habit statistically known to shorten the lives of smokers?  Discarding butts may be socially acceptable but when 6.5 trillion cigarettes are smoked each year around the world, and an estimated two-thirds of the ends flicked away carelessly, butts become the most littered plastic item.  Made of cellulose acetate they degrade slowly, and then into tiny microplastic pieces finding their way often into waterways and oceans.

The thrown-away butt, a lethal parcel of absorbed nicotine, heavy metals and chemicals, appears to marine life as food floating on the surface.  It has been found to be deadly to fish, and to inhibit plant growth.  A new addition, e-cigarettes are growing in popularity, their discarded pods posing a similar problem  — not to mention the e-cigarette itself, a package of plastic, electric circuitry and battery.

Another disturbing trend is for manufacturers to add plastic microbeads as cheap fillers in household products like toothpaste, shampoo and cosmetics.  Washed down the drain, and small enough to bypass the water filters at reclamation plants, these eventually find their way into the ocean.  Of course some can be swallowed accidentally by product users.  A Mother Jones (May 28 , 2015) article pictures an array of products containing them.

Fish are fooled by microbeads which are a similar size and shape to fish eggs.  Add all the other plastics and the chemicals adhering to them and they become a meal with long-term consequences for other predators as well.  The Guardian newspaper reports on five species affected by ocean plastics.  Fish-eating birds, whales with plastic-clogged stomachs, turtles snagged by plastic six-pack holders, crabs ingesting microplastics that also enter through their gills, even vital oxygen producing ocean bacteria are being harmed.

Birds eating plastic had stunted growth and kidney problems noted a University of Tasmania study with particular reference to the near-threatened flesh-footed shearwaters (long-winged oceanic birds).  They have estimated a million seabirds dying annually from plastic ingestion, and other researchers have tagged balloons as the “no.1 marine debris risk of mortality for seabirds.”  A high-risk item, ingesting a balloon fragment is 32 times more likely to cause death than a hard plastic item.

A map of the US showing the interest levels in plastic pollution for the different states as measured by the numbers of tweets about the subject might be appropriate in our new world of politics by tweet led by the president.  None of it helps the individual dying of kidney, liver or pancreatic cancer.  Infertility clinics abound as sperm counts decline in the west and specially in the US … joining the oysters mentioned earlier.

If we reflect on the issues, a logical answer emerges; that is, to reduce plastics, ban single-use items, increase recycling, and dispose of the rest safely.  Above all, educating us remains key.  Who knew cigarette butts are not just an unsightly nuisance but deadly?

Meena Miriam Yust is an attorney based in Chicago, IL with a special interest in the environment. Arshad M. Khan is a former professor who has, over many years, written occasionally for the print and often for online media outlets.

bernie-the-sandernistas-cover-344x550
February 27, 2020
Kenneth Surin
Trump in Modi’s India
Jonathan Cook
How We Stay Blind to the Story of Power
David Swanson
Bernie Finally Puts a Number on Cutting Military Spending
Nyla Ali Khan
Jammu and Kashmir Cannot be Reduced to Rubble
Aya Majzoub
Return to Bahrain: Nine Years After the Uprisings, the Nation’s Human Rights Record Has Worsened
Binoy Kampmark
Julian Assange Against the Imperium
Dean Baker
The NYT’s Analysis of Democratic Tax Plans: a Really Big Number Orgy
Lawrence Wittner
Trump Betrays His Promise to Protect and Fight for American Workers
George Wuerthner
Wilderness Preservation is Our Best Protection Against Wildfires
Brian Horejsi
Dancing Bears Weren’t Having Fun
Jesse Jackson
The Important Word in “Democratic Socialism” is Democratic
John Stanton
Democratic Socialism: From Fromm to Sanders
February 26, 2020
Matthew Hoh
Heaven Protect Us From Men Who Live the Illusion of Danger: Pete Buttigieg and the US Military
Jefferson Morley
How the US Intelligence Community is Interfering in the 2020 Elections
Patrick Cockburn
With Wikileaks, Julian Assange Did What All Journalists Should Do
Manuel García, Jr.
Climate Change and Voting 2020
Kollibri terre Sonnenblume
Russiagate: The Toxic Gift That Keeps on Giving
Andrew Bacevich
Going Off-Script in the Age of Trump
Jeremy Kuzmarov
Anti-Russian Xenophobia Reaches Ridiculous Levels
Ted Rall
Don’t Worry, Centrists. Bernie Isn’t Radical.
George Wuerthner
Whatever Happened to the Greater Yellowstone Coalition?
Scott Tucker
Democratic Socialism in the Twenty-First Century
Jonah Raskin
The Call of the Wild (2020): A Cinematic Fairy Tale for the Age of Environmental Disaster
George Ochenski
Why We Shouldn’t Run Government Like a Business
Binoy Kampmark
Julian Assange and the Imperium’s Face: Day One of the Extradition Hearings
Nozomi Hayase
Assange’s Extradition Hearing Reveals Trump’s War on Free Press Is Targeting WikiLeaks Publisher
Peter Harrison
Is It as Impossible to Build Jerusalem as It is to Escape Babylon? (Part Two)
Max Moran
Meet Brad Karp, the Top Lawyer Bankrolling the Democrats
David Swanson
Nonviolent Action for Peace
Ed Sanders
The Ex-Terr GooGoo Eyes “The Russkies Did it!” Plot
February 25, 2020
Michael Hudson
The Democrats’ Quandary: In a Struggle Between Oligarchy and Democracy, Something Must Give
Paul Street
The “Liberal” Media’s Propaganda War on Bernie Sanders
Sheldon Richman
The Non-Intervention Principle
Nicholas Levis
The Real Meaning of Red Scare 3.0
John Feffer
Cleaning Up Trump’s Global Mess
David Swanson
How Are We Going to Pay for Saving Trillions of Dollars?
Ralph Nader
Three Major News Stories That Need To Be Exposed
John Eskow
What Will You Do If the Democrats Steal It from Sanders?
Dean Baker
What If Buttigieg Said That He Doesn’t Accept the “Fashionable” View That Climate Change is a Problem?
Jack Rasmus
The Nevada Caucus and the Desperation of Democrat Elites
Howard Lisnoff
The Powerful Are Going After Jane Fonda Again
Binoy Kampmark
Viral Losses: Australian Universities, Coronavirus and Greed
John W. Whitehead
Gun-Toting Cops Endanger Students and Turn Schools into Prisons
Marshall Sahlins
David Brooks, Public Intellectual
February 24, 2020
Stephen Corry
New Deal for Nature: Paying the Emperor to Fence the Wind
FacebookTwitterRedditEmail