We spend almost 80% of our time in enclosed spaces, where the air we breathe is on average 4 to 5 times more polluted than the air outside. ^{1 2}
We recommend a number of everyday measures to reduce indoor pollution, whether at home or in the workplace: air the home regularly, at least 10 minutes a day; don't smoke indoors, particularly to avoid passive smoking; don't use oil or gas-fired space heaters continuously in a poorly ventilated bedroom or room; fit your home or building with a ventilation system, and check that it's working properly on a regular basis. ³
The way we clean our homes can also affect air quality. In fact, it's best to use natural products such as black soap, baking soda or white vinegar.

For further information, we recommend that you consult :

1- Indoor Air Quality Observatory
2- Recosanté.beta.gouv
3- Assurance Maladie