Yep, right here on this forum you'll have people argue that we can't know they're bad because:
1. Ethically you can't really do interventional studies where you're putting pretty well-established toxins into people
2. Practically you can't do observational studies very well because a) observational studies generally are atrocious, especially for understanding intake of a substance and its biological effects and b) there aren't any natural control groups because the entire globe has microplastics
3. We can ignore the fact that in-vivo and animal studies show very similar effects as to what we're seeing at population-scale in humans, because... well there are other variables that are hard to control for (and it'd be super inconvenient to have to refactor these out of our global supply chain)
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Yep, right here on this forum you'll have people argue that we can't know they're bad because:
1. Ethically you can't really do interventional studies where you're putting pretty well-established toxins into people
2. Practically you can't do observational studies very well because a) observational studies generally are atrocious, especially for understanding intake of a substance and its biological effects and b) there aren't any natural control groups because the entire globe has microplastics
3. We can ignore the fact that in-vivo and animal studies show very similar effects as to what we're seeing at population-scale in humans, because... well there are other variables that are hard to control for (and it'd be super inconvenient to have to refactor these out of our global supply chain)