In modern days, particularly in urban areas, people may spend more time indoors. Thus, a healthy indoor environment is key for healthy living. The concept of “sick building syndrome (SBS)” refers to nonspecific complaints that occur at a higher prevalence in specific buildings.


AgnosticPreachersKid [CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0)], from Wikimedia Commons

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