In a ruling that could slow EPA’s approval of nanomaterial-based pesticides, the Ninth Circuit on May 30 invalidated EPA’s conditional approval of NSPW-L30SS, formerly known as Nanosilva. Natural Resources Defense Council (NRDC) v. EPA (9th Cir., May 30, 2017). The Court found that EPA’s determination that use of nanosilver-based pesticides would result in lower overall silver emissions into the environment, and therefore was in the public interest, was faulty because it was based on two assumptions that lacked support—that current users of pesticides containing conventional silver would switch to the new pesticide, and that the new pesticide would not be used in… Read more