Nanoparticles may have bigger impact on the environment than previously thought
(PHYSorg.com Nanotechnology)

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.