CP:** That´s a huge debate going on right now. For one thing, the U.S. and Europe haven´t even agreed to a fundamental approach to regulation: in Europe, they tend to regulate from the process side, while in the U.S., regulations apply to the product side of the industry. Right now, in this country, we´re dealing mostly with â€passiveâ€ nano materialsâ€found in products like sunscreens and a special coating on baseball batsâ€and are trying to figure out whether we can get by with tweaks to existing legislation, or if we need new regulations altogether. As for â€activeâ€ nano-devices [such as the precision guided tumor killers featured in PopSci´s August issue], we don´t really think about those that much, since our systems aren´t set up to deal with them. However, there is still the potential for some crossover: any active nano-device that has a medical application, for example, will have to adhere to the standard medical regulations, which are plenty strict as is. In terms of less-regulated areas, like cosmetics, it´s more problematic.