What if reasonable advice leads us in the wrong direction?
Health recommendations sound reassuring. Keep windows closed when there is noise. Better not ventilate when outdoor air is poor. Air out rooms briefly several times a day and everything will be fine. Advice like this seems reasonable, responsible, and scientifically backed.
But what if that is exactly where the problem lies?
In Dicke Luft, we tell how we kept encountering a disturbing contradiction: there can be a surprisingly large gap between what is publicly recommended and what studies have actually investigated. Complex research findings become simple rules. Careful indications become everyday headlines. And well-intentioned caution can create new burdens.
This becomes especially delicate where a recommendation focuses on only one problem while leaving out another. Anyone trying to avoid noise or outdoor air pollution keeps the windows closed and simultaneously changes the air in the room in which they live or sleep for hours. What looks like protection can thus unnoticed become a burden in itself.
That exact experience runs through our book: that reasonable advice does not always reflect the whole reality. That standards can be reassuring without truly protecting people. And that some recommendations simplify more than the evidence actually allows.
That is why Dicke Luft pursues an uncomfortable question:
What if we suffer not only from pollutants, rooms, and bad air, but also from the wrong conclusions drawn from them?
Have You Ever Been Asked This?
We are asked about diet. About stress. About sleep, medication, and blood values.
But has a doctor ever asked you how often you ventilate? Whether you work in stuffy rooms? Whether new furniture, carpets, cleaning products, fragrances, mold, a gas stove, or a fireplace could be affecting your indoor air?
Air is one of our largest daily pathways of contact with the environment. We take in food and water in just a few kilograms per day. Air, by contrast, in many thousands of liters. Roughly speaking, 80 to 90 percent of the environmental mass we absorb each day enters through breathing.
