On May 15, 2007, the Natural Resources Defense Council (NRDC) issued a report entitled Nanotechnology’s Invisible Threat: Small Science, Big Consequences, which claims that the U.S. government has failed “to use its authority to protect citizens from the potentially dangerous effects of nano-scale chemistry.” NRDC proposes a three-part framework for regulating nanomaterials, and based the framework on a precautionary approach to managing toxic chemicals:...