Introduction of new substances to workplace or living environment may be followed by various potential and actual hazards and ignoring them will entail great risks. This paper conducts a general discussion on the impact of nano-particles and nanotechnology on human health and their possible damages to environment. As much as nanotechnology has appealed to people, its environmental hazards have raised concerns. Therefore, methods used to manage health hazards of nanotechnology will be subject of future researches.
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