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There is no one answer to your question as there are nanoparticles that will affect the environment and those that will not. It is a matter of a case by case decision. There is a lot of research being carried out on nanoparticles.

Nanoparticle refers to the size of the particle in question not the nature of the material. The most common nanoparticle in the environment is the diesel exhaust emission of trucks, these are breathed straight into our lungs like an excellent carrier mechanism for carcinogens (cancer causing chemicals).

Milk is another common nanoparticle substance with nanoparticle size fat droplets suspended in water. Let's not worry if this nanoparticle substance is going to affect the environment.

Cloud seeding is now believed to have an adverse effect on the environment. It has been used for many decades but is detrimental to the ozone layer.

Suntan lotion has had no reports of problems due to the nano size of the zinc particles.

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14y ago

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