Air pollution is undoubtedly the most problematic type of pollution, as it may involve serious long-term health effects. It is made worse by the fact that everyone could be exposed - because everyone needs to breathe! You can choose the water you drink, but you can't do much about the air you breathe. Additionally, many air pollutants can travel long distances from their source, posing risks to our health even in concentrations below the threshold of smell. In other words, we might not even feel that we are breathing polluted air. However, over long periods of time, even low concentrations of contaminants in the air may have devastating health effects. Obviously, the most exposed people are those working and living in polluted air environments (e.g. various industries and buildings with pollutants in indoor air due to various causes). Additionally, big city smog is a reality all over the world, involving outdoor air pollution and potentially affecting a large number of people