Sunscreens, lotions, and cosmetics contain tiny metal
nanoparticles that wash down the drain at the end of the day, or are discharged
after manufacturing. Those nanoparticles eventually end up in agricultural
soil, which is a cause for concern, according to a group of environmental
scientists that recently carried out the first major study of soybeans grown in
soil contaminated by two manufactured nanomaterials (MNMs).