What if the heaviness does not come only from within us?
Depression and exhaustion are usually seen as the result of inner crises, biographical burdens, psychological vulnerability, or chronic stress. Fatigue, lack of drive, hopelessness, and the loss of joy in life appear as something that arises within the person. But what if environmental factors also play a bigger role than previously assumed? What if polluted indoor spaces, chronically poor air, and a lack of fresh air supply could at least intensify depressive symptoms and deep exhaustion? The book asks exactly this question and connects it both with personal experience and with scientific indications that, alongside biological and psychosocial factors, environmental and burden-related factors are also being discussed.
In Dicke Luft, we do not just tell of depression, exhaustion, and the feeling of no longer being able to go on living, but also of the disturbing possibility that the air in indoor spaces may have played a greater role in all of this than we could ever have imagined.
When Tiredness Becomes Something Deeper
In the book, this topic does not begin with a diagnosis, but with a gradual process. Tiredness becomes exhaustion. Exhaustion becomes something deeper: a life that feels increasingly heavy, an everyday existence that can only be endured, and an inner darkness for which no one has any real explanation. It describes how physical and mental exhaustion was eventually joined by depression and how this experience was read from the outside primarily as personal weakness or misconduct.
This interpretation is central. Because anyone who no longer understands themselves and is viewed from the outside mainly as weak, lazy, or psychologically defective eventually begins to adopt the same view of themselves.
When Air Is Never Taken Into Account
One recurring thread of the book is that for a long time air was not considered at all as a cause or contributing factor. Much of what later came together into a severe pattern of complaints had already been there before: tiredness, irritability, concentration problems, pressure in the head, sleep problems, and the feeling of mental slowing. These very symptoms are also described in the book in connection with elevated CO2 levels in poorly ventilated indoor spaces. It says that the complaints often develop gradually and are therefore not immediately linked to indoor air. Instead, affected people tend to look for the causes within themselves, for example in psychological strain, individual performance, or personal weakness.
The Most Oppressive Question
This development becomes especially shocking where depression and exhaustion turn into suicidal thoughts. The book describes how life reached a point where it no longer seemed livable. What matters here is this: the book does not set up a simple equation. It does not claim that indoor air generally causes depression or suicidality. But with great force, it shows that mental crises must not automatically be explained only by inner conflicts, trauma, or character traits when life is simultaneously unfolding in chronically polluted indoor spaces.
Precisely because the air is invisible, it is almost always overlooked in such situations.
Indoor Air as a Possible Amplifying Factor
We are not claiming that depression and exhaustion are generally caused by poor indoor air. It is not that simple. Our book does not provide a final answer to that either. But it firmly raises the question of whether polluted indoor spaces, poor ventilation, CO2, VOCs, and other air pollutants could be a relevant amplifying factor for some people.
Because if tiredness, irritability, loss of concentration, sleep disorders, hopelessness, and psychological instability plausibly increase under certain environmental conditions and noticeably change under others, then air can no longer remain mere background. Then it belongs in the picture.
Why We Are Writing About This
Dicke Luft is not an attempt to simply reinterpret depression. It is a personal search for clues. A story about exhaustion, dark thoughts, diagnoses, therapies, and the slow realization that perhaps we must not look only in the psyche, only in biography, and only in genes, but also in the air that people breathe day after day.
The book connects personal experience with scientific indications of the health relevance of indoor air. It invites readers not to reduce depression and deep exhaustion too quickly to a single explanation, but to take environmental factors more seriously than is usually the case.
Perhaps Part of the Heaviness Is in the Air
Perhaps in many cases depression and exhaustion are exactly what medicine understands them to be today: complex states with many possible causes and often no simple solution. But perhaps there are also cases in which polluted indoor spaces, chronically poor air, or certain exposures play a stronger part than previously assumed. Perhaps indoor air is not the whole explanation. But perhaps it is a missing piece of the puzzle.
And perhaps the crucial question begins not only within a person, but also in the room where that person breathes day after day.
