Forget BPA and asbestos, watch out for silver nanoparticles
That doesn’t seem to have happened with nanoparticles. I’m not usually one to get up in arms about possible chemical scares (I’m a big fan of both Aspartame and MSG) but this seems pretty legit: the widespread use of nanoparticles in products that have contact with skin, water systems, other chemicals and so on is so new that there can’t possibly have been time for rigorous testing of possible effects. Even companies that tout themselves as “green” or “organic” are using the tech, which is more an indicator of the weight of a label like “green” than of the safety of the product.