A trendy diet

"In the case of microplastics, many researchers are drawing closer to the possibility that there are no humans left in the developed world who have not been exposed to them." https://medshadow.org/the-impact-of-microplastics-cant-be-studied-because-there-is-no-control-group/

"... it is often used for modern particle detectors because more modern steel is contaminated with traces of nuclear fallout." https://en.wikipedia.org/wiki/Low-background_steel

We'll be dealing with the after effects of the early Anthropocene for eons.