Environmental toxicology is one of the branches of forensic medicine and toxicology. Nanoparticles are increasingly being used in consumer products and have a wide range of toxic effects on the environment. Metal/metal oxide nanoparticles are used in everyday goods such as cosmetics, electronics, and food. The toxicity of nanoparticles is due to their small size and interaction with living organisms. In order to minimize the impact of nanomaterials on the environment, it is important to ensure that they are designed and manufactured with sustainability in mind. This means looking at how they interact with the environment and the potential for harm before they are released. Additionally, it is important to consider the potential for end-of-life disposal of nanomaterials and consider alternative ways to dispose of them. Finally, it is important to develop appropriate regulations and standards for the manufacturing and disposal of nanomaterials and to monitor their impact on the environment.