In pictures: Nanotechnology in our lives
Spoonful of particles

There are five grams of nanoparticles in this beaker, enough for every person on Earth to have three million each.

Nanoparticles, used in coatings for instance, concern some because they are new materials which could move inside bodies in unpredictable ways.

Nano-sized particulates, like diesel emissions, are already inhaled daily in urban areas.

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