[tsimionescu]

> Since we don't know about the effects microplastics accumulation long term effect, the worst case is that at that there exists some threshold that make higher life form impossible, maybe that threshold doesn't exist but maybe it does.

I also wanted to answer this. This is non-scientific BS based on literally nothing. Risks don't work like this: unless you can quantify them, you can't act on them. Any activity has some potential risk of unknown catastrophic effects. Maybe there is some chance that after a threshold, flushing our toilets will cause tidal effects that rip our planet apart - it's unlikely but it's possible. So let's all stop flushing our toilets. And stop using 5G if we're there, some people think that has a high risk of causing cancer or whatever.