Among the other answers here, there is some evidence micro/nanoplastics measurably change behavior (and by implication cognition) in crustaceans[0] though it's

Among the other answers here, there is some evidence micro/nanoplastics measurably change behavior (and by implication cognition) in crustaceans[0] though it's unclear what this reveals w.r.t humans it does seem to suggest we ought to be wary given that we have inadvertently (and effectively irreversibly) filled ourselves and our habitats with the stuff https://royalsocietypublishing.org/doi/10.1098/rsbl.2020.0030 https://royalsocietypublishing.org/doi/10.1098/rsbl.2020.003...