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I do my best to minimize micro plastics but also try not to worry about things I can't control. That cat is already out of the bag, micro plastics are inescapable. The silver lining this study show that they aren't that dangerous and its relatively easy for the body to get rid of them over the course of a month. While obviously its hard to say about long term toxicity it seems that life is at least generally resilient to it.
If I may add one personal anecdote. My parents were born in the 60s and 70s. They chain smoked cigarettes for many decades before their health finally caught up with them. Yet somehow they resisted the numerous toxins and carcinogens and tar they exposed themselves too every moment of the day. Maybe they are just really lucky but also maybe living things that got this far in the evolutionary tree already have expetience in biologically adapting to survive. Our cells aren't such easy pushovers to die over any and every little changes in the environment or new chemical players introducing themselves in the game of life.
I mean, every person who has died from cigarette related lung conditions might disagree that we've evolved past it. That's just survivor bias.
But also, micro plastics can get past the blood brain barrier and as far as we know, there's no way for our bodies to clean them out. Nano plastics are also getting imedded in lung tissue. We don't know yet the repressions of this but I avoid buying plastic any time there is an alternative. Yes, it's unavailable that we consume it, but that doesn't mean I'm going to bring it into my house.
These days plastic products are sold at huge profit. It blows my mind to see a polyester shirt and a cotton shirt selling for the same price when the polyester probably cost a couple cents to produce.
My siblings and I often marvel that we survived growing up in the 1950s and 60s. DDT, leaded petrol, lead paint, asbestos fake snow, most adults smoking like chimneys, coal fires.... My brother recently got through a type of leukaemia linked to the glue he used to make model planes.
On the other hand, plastic was rare back then. Containers were metal, glass, wood, ceramic. Shopping was carried in string bags or wicker baskets. The butcher wrapped meat in paper, lined with a sheet of waxed paper if it was bleeding. When plastic arrived big style it was cool, convenient, modern. In the 70s everyone had Tupperware - argh, those parties...
This was all in New Zealand btw, something of a conservative backwater. The Australian time zone joke ran: "If it's 7pm in Sydney, it's 1956 in Auckland."
Go to any VA hospital. Some people can live through being shot. Some people can live a full life with their legs blown off. Ask them about the "unevolved" people who couldn't handle loving with a bullet hole in their body.
Go to a rehab facility and ask people what it's like when most of their cells find a way to keep living.
Go to a graveyard and ask how many people didn't survive lung disease or smoking related cancer.
Yeah it's a bit of a buzzword, there's no real evidence yet that it's a problem and a few areas we'd expect to see them already - plastic factory workers and similar seem to be no less healthy than counterparts in other industries for example.
It feels bad hearing micro plastic is found on ocean floors but really it's just going to vanish under a layer of other creatures trash like shells and bones or the dirt drifting in the currents until it finally settles. We need to look after the planet but it's worth remembering she's a tough old egg.