Nanoparticles may have bigger impact on the environment than
previously thought

Over the last two decades, nanotechnology has improved
many of the products we use every day from microelectronics to
sunscreens. Nanoparticles (particles that are just a few hundred
atoms in size) are ending up in the environment by the ton, but
scientists are still unclear about the long-term effects of these
super-small nanoparticles.