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What can happen due to nanoparticles being so small?
It is possible for them to be inhaled and enter the lungs.
What happens once nanoparticles are inside the body?
They may initiate harmful reactions.
Toxic substances may bind to them because of their large surface area to volume ratio.
What are the uses of nanoparticles?
Sun creams, deodorant, cosmetics. Also as catalysts.
Why is it difficult to determine risks of nanoparticles?
They are a relatively new phenomenon so it is difficult for scientists to determine risks.