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Earth United States Science

22 Million Pounds of Plastics Enter the Great Lakes Each Year (chicagotribune.com) 98

An anonymous reader quotes a report from Chicago Tribune: Plastic debris makes up about 80% of the litter on Great Lakes shorelines. Nearly 22 million pounds enter the Great Lakes each year -- more than half of which pours into Lake Michigan, according to estimates calculated by the Rochester Institute of Technology. Regardless of size, as plastics linger in the water, they continue to break down from exposure to sunlight and abrasive waves. Microplastics have been observed in the guts of many Lake Michigan fish, in drinking water and even in beer. Perhaps the most worrisome aspect is that the impact of microplastics on human health remains unclear. Plastics are known to attract industrial contaminants already in the water, like PCBs, while expelling their own chemical additives intended to make them durable, including flame retardants.

While there are still more questions than answers about potential health consequences, one thing is clear: Southern Lake Michigan is a hot spot for plastics. Once plastics enter the lake, they follow lake currents, potentially migrating to other states but largely remaining trapped at the southern end. What goes into Lake Michigan typically stays there. While water from the other Great Lakes moves downstream, Lake Michigan's only major outflow is the Chicago River (and the water it intermittently exchanges with Lake Huron at the Straits of Mackinac). As a result, a drop of water that enters Lake Michigan stays for about 62 years, according to the National Oceanic and Atmospheric Administration.
A study published last year found that around 85% of fish caught from three major Lake Michigan tributaries -- the Milwaukee, St. Joseph and Muskegon rivers -- had microplastics in their digestive tracts.

"In the sample size of 74 fish representing 11 species, the invasive round goby had the highest concentrations, possibly from eating filter-feeding quagga mussels, which scientists suspect may be accumulating microplastics," the Chicago Tribune reports. "While detecting microplastics in the guts of Lake Michigan fish is significant, scientists are now studying if these pollutants build up or are excreted by the fish."
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22 Million Pounds of Plastics Enter the Great Lakes Each Year

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  • "While detecting microplastics in the guts of Lake Michigan fish is significant, scientists are now studying if these pollutants build up or are excreted by the fish."

    This is, of course, the sort of thing that biologists at lakehead university would study (do they lurvs their fishies)...if their department wasn't gutted by the anti [ctvnews.ca]-science [academicmatters.ca] Harper government. And then if issues like this ignored [pulitzercenter.org] by the Trudeau government, maybe the people who came to canada to study fish [twitter.com] wouldn't be constantly on the verge of leaving.

    But let's vote the Liberals/Cons back in, amirite Canada?

    • But let's vote the Liberals/Cons back in, amirite Canada?

      What't the alternative the NDP? Hahahahaahahahahahahahahahahahahahahahaha

      • But let's vote the Liberals/Cons back in, amirite Canada?

        What't the alternative the NDP? Hahahahaahahahahahahahahahahahahahahahaha

        The coming Canadian election is about to shock the shit out of the Americans and the polsters and pundits. The government will either be a weird green party/ndp mashup or a completely unholy liberal/conservative coalition with Justin and Andrew ready to stick each other with the knives they hide behind their backs. The bullshit that is going on with organized crime and real estate money laundering, rape of the forests, the systematic destruction of anadromous fish habitat and government sponsored over-fishi

      • Yes, The NDP + greens.
  • by cormandy ( 513901 ) on Thursday September 05, 2019 @01:05AM (#59160484)
    As a child growing up in Ontario in the 1970s we would occasionally spend the day at Lake Erie and I have memories of collecting up pink plastic applicators from tampons which had washed ashore. I had no idea what they were at the time but there were a lot of them and would feature in the sand castles I would build.
  • by Solandri ( 704621 ) on Thursday September 05, 2019 @01:23AM (#59160516)
    While I'm all for reducing trash in the environment (especially plastics), my distortion alarm goes off whenever I see small units being used. Usually it's done to exaggerate the size of a problem.
    • Volume of the Great Lakes [wikipedia.org] = 2.3x10^16 liters = 2.3x10^13 tons
    • 22 million pounds = 10 million kg = 10,000 tons
    • Fraction of plastic waste added each year = 10^4 tons plastic / 2.3x10^13 tons water = 1 part plastic per 2.3 billIon parts water

    This is really a very small amount. Especially compared to other countries [earthday.org] which are adding hundreds of thousands or millions of tons of plastic to the water each year, and are not even trying to reduce or control it. (70%-90% of their waste ends up in the landscape and waterways, vs 2% in the U.S.)

    Lowest-hanging fruit first guys. It's a waste to spend money reducing mismanged plastic waste here by a few hundred tons, when a mere fraction of the same amount spent elsewhere would reduce it by thousands or tens of of thousands of tons.

    • So it's okay to dump your plastic somewhere big, and (as yet) not very laden with the stuff?

      Yes, others are worse, but that doesn't sound like an excuse to pollute something/somewhere because you're not as bad as them.

    • It's our source of clean drinking water. Any amount of plastic is too much.

      • by Shotgun ( 30919 )

        He says as he sips his bottled water or coffee from a styrofoam cup, eating his danish off a plastic plate with a plastic fork, while sitting in a polyester covered chair rolling around on a polyester carpet and typing on a plastic keyboard.

        OK. I'll admit. That's just me, but I doubt any Slashdotter is much different. We're constantly surrounded by plastic. The grandparent's point about 2.3ppb being noise is well founded.

        • I'm sipping from a glass bottle of bear, sitting on a chair made from wood and steal on a cotton covered pillow filled with wool.
          However the MacBook Air I'm typing on has plastic keys ....

          We have no carpet, we have stone floors, and depending if we move or improve the house, it will get a wooden floor.

    • It's not about general averages, it's about concentration and distribution.

      https://en.wikipedia.org/wiki/... [wikipedia.org]

  • Pounds? What is this, the dark ages?
    • Re: (Score:3, Interesting)

      Pounds? What is this, the dark ages?

      No it is the new age of American Conservative measurement which adds perceived weight to the data, by converting metric Kg to imperial Lbs you can more than double the numbers of American Conservatives reading the post, clutching at plastic strawman arguments then spewing anti Al Gore and anti environmental science rhetoric on Slashdot.

      I say bring back the anon cowherd and double the dose of articles about plastic pollution at least then we might see more intelligent arguments than a moron blaming China,

  • So, 22 million pounds per year, which is 10 gigagrams per year.

    If we assume a density of 1.0 kiligrams/liter (same as water, basically), then we're talking 10 megaliters of plastics per year, dumped into 22.8 petaliters of G'Lakes every year. So, in the timezone of 0.00000005% plastic every year?

    So in a century, we should see 0.000005% of the water in the Lakes replaced with plastics? Assuming that none of the plastics goes out to sea (yeah, the G'Lakes are still connected to the Atlantic), of course.

    I

    • ...or look at it a different way: it's not a big problem, so it won't take much to eliminate it entirely.

      Or, alternatively, do nothing and enjoy the level of 'dumping' increasing every year because no one does anything about it. I've never been to Lake Michigan, but I'll bet it's much more interesting in its relatively natural state than a polluted one.

  • If I did the math correctly the mass of the water in the great lakes is 50,000,000,000,000,000 (4.9E16) pounds, which means we'll need to a lot better than 22,000,000 (2.2E7) pounds per year if we're ever going to fill it up.

  • We take all the plastic waste and bury it in a desert. Eventually the plastic will break down and we will have a new supply of easily accessible oil. This will keep the lakes and rivers clean while providing a future energy source.

Keep up the good work! But please don't ask me to help.

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