> I'm told they can be as small as a protein molecule. Sounds about right given that we've just learnt that plants can take up plastic though their roots: http

> I'm told they can be as small as a protein molecule. Sounds about right given that we've just learnt that plants can take up plastic though their roots: https://www.nature.com/articles/s41565-020-0707-4 https://www.nature.com/articles/s41565-020-0707-4