Goodbye To Critical Infrastructure
Nanotechnology is obviously quite small, allowing it to pretty much go anywhere one would want it to. This is good as it could quite literally allow humans to do things that we never could before. Yet this is also part of the problem, as it could enter pretty much anywhere to disrupt things we need. Important infrastructure like power grids, communication networks, and even transportation systems can all be damaged or at the very least altered. That could cause several problems that would cripple several cities all over the world. This sort of thing can also impact economies, causing potential nationwide ramifications. It would likely impact smaller nations the quickest but would also affect larger nations relatively fast too.