Nano what?

Quote of the day: Research showed that, breathed in through the nose, nano particles of Magnetite (an oxide of iron) entered the brain via the olfactory nerve. These nano particles are thought to play a role in degenerative illnesses such as Alzheimer. (Freely translated from French. Source: Le Temps Sept. 7th, 2016)

Comment: This tiny snippet of news was buried between a half page spread on the weather and an equality generous article on gardens. Surely the subject deserves more attention. It implies that some made-made substances, widely used in clothes, packaging, food, medicines and elsewhere, could be highly detrimental to our health. Why are there not tighter controls over their use?

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