Unintentional Or Accidental Release
Again, there is a lot that nanotechnology can do for us. However, there is just as much we have to worry about too. Since nano-materials have different physical, chemical, and biological properties than their larger counterparts, problems could exist. For example, we know we should avoid highly radioactive materials and there will usually be signs up telling us where they are. Yet what if you could come across the exact or higher radiation as a place like Chernobyl but in a small nano-size piece of technology? There is also the possibility that nanotech could accumulate living organisms and interact with the environment, both of which could have massive impacts on the world. We should not just use nanotech because it is there and we must evaluate all potential issues before they become problematic.