Whenever I feel under the weather or even just a lack of energy, I go outside to partake in the clean fresh air. It always makes me feel better. I feel very sorry for people who live in polluted cities, places ranging from Albany to Mexico City. They don't know what they're missing. It's apparent that people don't mind having many of these foreign substances in their lungs.
People love to smoke cigars and cigarettes.
A railroad man loves the smell of coal smoke. Some people like the smell of gasoline. The fact is that indoor air quality leads to illness, boredom, and general despair. This is why only chemical-free products should ideally be used indoors. I don't think we can ever get away from the problems we have completely, but research about indoor air quality should continue and be a top concern of individuals, especially in new buildings and those that are prone to sick building syndrome.