Why indoor air is more polluted than we think (and how to fix it)
We often associate air pollution with big cities, cars, or industries. However, what is less known is that indoor air can be several times more polluted than outdoor air.
This finding is all the more important given that we spend the majority of our time indoors: in our homes, at work, or in enclosed spaces. Understanding the source of this invisible pollution helps us better act to improve air quality every day.
Why is indoor air so polluted?
Unlike outdoor air, indoor air is often confined and poorly ventilated. Pollutants gradually accumulate without being properly evacuated.
Several sources contribute to this pollution:
- household products and sprays
- furniture and materials (adhesives, paints, varnishes)
- food cooking
- dust and dust mites
- humidity and mold
To this is added a key factor: lack of ventilation. When the air is not renewed, fine particles, allergens, and chemical compounds remain suspended.
The role of humidity in air quality
Humidity is a central, often overlooked, element. Excessive humidity creates an environment favorable to many biological pollutants.
Specifically, excess humidity can lead to:
- the development of mold on walls
- the proliferation of dust mites
- persistent odors difficult to eliminate
- a feeling of heavy, uncomfortable air
Conversely, air that is too dry can also be irritating to the respiratory tract. This is why it is recommended to maintain a humidity level between 40% and 60%.
What are the health risks?
Poor indoor air quality can have real consequences for health, especially when prolonged over time.
The most frequent effects include:
- fatigue and headaches
- eye and throat irritation
- respiratory allergies
- worsening of asthma
These symptoms are often difficult to identify, as they are linked to an everyday environment.
How to improve air quality at home?
Improving indoor air relies on several complementary actions.
Regularly renew the air
Ventilating your home helps evacuate some of the accumulated pollutants. Even a few minutes a day can make a difference.
Limit sources of pollution
Using more natural household products or avoiding chemical sprays helps reduce airborne particles.
Control humidity
Maintaining a good humidity level is essential to prevent mold and allergens.
Filter the air
Certain solutions can capture fine particles, allergens, and invisible pollutants, to obtain healthier air every day.
Towards healthier indoor air
Improving indoor air quality is not just a matter of comfort, but also of health and well-being.
By understanding the sources of pollution and adopting good habits, it is possible to transform your environment into a healthier, more breathable, and more pleasant place to live.