One main ethical issue that is asked by many is how the potential of nanorobots many cause the world to change drastically. Because nanotechnology aids in the elimination of diseases by creating nanorobots, which is often kept in laboratories, some fear that if accidently let out into society it can turn into "gray goo." Gray goo is "a theoretical existential risk scenario involving molecular nanotechnology in which out-of-control self-replicating robots consume all matter on Earth while building more of themselves a scenario known as ecophagy (eating the environment)". (10.1) 

 

Additionally, because nanorobots have not thoroughly been reviewed in many trials, many question its safety hazards.  Due to the fact that nanorobots include a prescence of little knowledge, some feel that in an area where lack of knowledge plays a large role, the nanorobot use may cause damage to the brain and other major problems.

 

Another common issue related to nanorobots is how they risk causing a change to human identity. Because nanorobots can instantly enter a human body and fix a genetic disease or a regular pathogen that is not wanted in the bloodstream, many feel that it is changing the destiny of that peron's life because it is eliminating what was purposely supposed to take place.  People often state that if nanorobots can fully eliminate diseases, it will cause the human race to be equivalent in health, and this will lead to less diversity.