My understanding is that much of the West’s second-hand and overstock clothes ends up in countries like Ghana, where it does end up in waterways[1]. This has presumably increased over time due to fast fashion, which is a large market in Europe (like in the US).
Microplastics are emitted from clothing and flushed into the waste water system, and from there to oceans, every time you do laundry. This is considered to be the main source of microplastic pollution, including in the EU unless they managed something revolutionary that I'm not aware of.
You really need to cite a source on this subject, measuring the industrial waste is very difficult and any articles state that "we found this but anyway, it's difficult to track efficiently the industry wastes".
