Many nanoparticles, including nanosilver, wash down drains and are not removed by sewage treatment, so they are discharged into lakes and rivers, where fish and other aquatic life are exposed. Research into the environmental implications of these silver nanoparticles has begun, but there are no answers yet about what happens when they enter ecosystems.

“I think we jumped the gun” by creating such large volumes of nanoparticles, said University of Utah researcher Darin Furgeson. “We should take more time and really look at these new nano-systems before we start to throw them into personal products and shoot them into these ecosystems.”