they’re generally concerned about ingesting (eating) those microplastics and then having them accumulate in their stomachs.
besides that, larger plastics also are easier to collect and have them recycled (in theory at least) than microscopic particles.
but yeah from an environmental standpoint all plastics “deserve to be worried about”.
The tube is more or less stable while it’s in use. Plastics usually deteriorate and degrade into microplastics after being exposed to the elements for some time, like lying around in a landfill or floating in the ocean. Those microplastics then enter the food chain and work their way up into our bodies through food.
>Isn’t that tube going to break down into way more microplastics than the toothpaste itself contains?
Not in a meaningful amount while you’re still brushing.
When you throw the empty tube in the forest or the next river instead of properly disposing it, it WILL turn to microplastic after some years, but hey at least not inside your mouth.
Where I live we have recycling bins that will mostly end up being burned to generate heating or electricity.
People are also generally concerned with plastic use and where it comes from. So it’s not like we only care about microplastics.
However, it’s much easier to deal with a tube you can see with your eyes than with microplastics you cannot see. So microplastics in toothpaste will end up directly in the water whereas a plastic tube will end up in disposal somewhere. It could still end up in the ocean, but it’s hardly guaranteed.
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