Water Clean-Up - Taylor and Gabe go to the Franklin Institute in Philadelphia and learn that nano-iron is being used to neutralize toxins in ground water. They collect soil samples from a contaminated site, then take them to Penn State University to test the efficacy of nano-iron treatments. Nanosilver - Sarah and Mande visit the Sciencenter in Ithaca and learn that nanosilver is used in some socks to kill bacteria, keeping them odor-free. They wonder if the nanosilver in socks leaches out when you wash them, causing potential harm to beneficial bacteria and the environment. They buy two different brands of nanosocks and wash them. Then they take the socks and their wash water to Cornell University to test their effects on common bacteria.
