Physics · Nanotechnology
Consider the following statements regarding nanoparticles: 1. Other than those made by humans, nanoparticles do not exist in nature. 2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics. 3. Nanoparticles of some commercial products which enter the environment are unsafe for hu mans. Which of the statements given above is/are correct?
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2 and 3
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