Discuss current or future applications of nanotechnology in fields such as medicine

Discuss current or future applications of nanotechnology in fields such as medicine, engineering, space exploration, fuel cell development, air and water purification, and agriculture.Provide at least three examples of real-world applications in use or in development with reliable references.

must not be plagarised and must be clear accessible references  use whatever you want to discuss I do not mind wether is is medicine or any one of the others listed. Just pick one to talk about

need at least one paragraph thanks in advance