[bildung]

Textiles (through washing) and Tyres (abrasion on the road) are by far the biggest sources of microplastics. https://www.eib.org/en/essays/plastic-pollution

Introduction of these notes will probably not even be visible in microplastics assays.

[londons_explore]

Textiles seem like quite an easy fix - simply require HEPA style liquids filters on every washing machine before water is sent down the drain.

The filter could be big and designed to last the life of the machine. It's far better to dispose of a single chunk of solid plastic waste than the billions of particulates that would have gone into waterways...