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Should we be afraid ?

Are we overdoing it?
Men have always lived in an atmosphere loaded with natural or anthropic nanoparticles and every liter of air contains several millions of nanoparticles. Yet some clues encourage prudence. Legitimate fear or phobia? We can wonder. See http://www.cnrs.fr/cw/dossiers/dosnano/.

Since human beings exist

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Anthropogenic particles are emitted by combustion (fossil energy, biomass), transport fumes or industrial activities.

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Natural nanoparticles are produced vegetation, volcanic eruptions, sea spray or erosion.

Since that man exists, it inspires 5 to 10 million particles of very different types at each inspiration without suffering from any apparent damage. A barbecue produced a very significant expansion of nanoparticles in the neighborhood.

However, the particles emitted unintentional can be harmful to human health, such as soots emitted by certain industrial activities and by the engines (petrol, diesel).

The french institue “Santé Publique France” estimates in 2016 that 34000 deaths could be prevented in year in France if all communes of France decrease the level of the airborne particles.