If we include in the definition of “invisible enemies in the air” such elements as microorganisms (viruses, bacteria) and dust and volatile organic compounds (VOCs), their impact on our lives can be really significant. Below are the most important of the areas and consequences of the impact of the title “invisible enemies.” Health: Microorganisms can cause infectious diseases such as influenza and COVID-19. Similarly, dust and VOCs can lead to health problems, including respiratory and cardiovascular diseases. Prolonged exposure to these substances reduces quality of life and can shorten life expectancy. Work environment and education: Both infectious diseases and air pollution can affect absenteeism from work and school, which in turn affects productivity and educational processes. Social interaction and quality of life: Fears of infection and high levels of pollution can alter social behavior and limit outdoor activities, affecting social norms and personal preferences. Economy and property values: Epidemics and air pollution can affect the economy, reducing the investment attractiveness of regions and increasing health costs. Real estate in polluted regions may lose value. Policy and regulation: Governments around the world are introducing regulations to curb the spread of disease and reduce emissions. Air quality standards or health protocols are part of efforts to protect public health. Awareness and education: Increasing public awareness of the negative impacts of pollution and airborne diseases is leading to changes in behavior, promoting healthier lifestyles and better environmental decisions. As can be seen from the examples above, the invisible enemies in the air really do affect our lives widely, from health to the economy, while requiring integrated action at both the individual and societal levels. On a less global level, with regard to our immediate environment – especially indoor spaces, where we statistically spend about 90% of our lives, we can fight some of the described invisible enemies ourselves. And effectively. The Espirio system, which monitors precisely the quality of the indoor environment, including dust and volatile organic compounds, will help us.