美国环保署[环境保护署，这是一个美国联邦机构致力于保护环境]在其报告中讨论了如何使室内空气质量不舒服的人。室内空气质量被认为是减少，因为烟草烟雾，家用产品，如石棉和更多（MEDLINE Plus，2014）。生活在这种室内空气中的人可能会受到过敏或可能会患上喘鸣等症状。另外一个人已经过敏可能觉得室内空气实际上是使他们更不舒服。这可能是由于生理的原因，也可能是因为心理上的原因，也有健康的威慑，因为空气质量（格劳登茨et al，2006）。有时一栋楼的人同时生病，这就是所谓的病态建筑综合症。这种病态建筑综合症的一些原因是，通风不完善的建筑标准不符合和暖通空调[暖气，通风和空调的环境舒适性，这些都是标准化法规）制度是不够的。有可能存在化学污染物从其他室内来源和化学或生物成分的户外来源也可以出席（EPA，1991）。有些人离开家后可能会感觉好一些，其他人可能会经历恶化的症状。症状，如过敏反应，喘息或呼吸急促可以治愈的症状，但积累的不良健康的污染物存在于建筑物可能导致问题后。慢性喘息或哮喘会导致肺损伤，使人容易继发感染如肺炎、心动过速，增加心输出量等（分，et al，2012）。
Increasing air pollution has been addressed in the context of many global phenomenon such as global warming, increased fossil fuel usage and more. However, in most of the underlying reasoning, it can be observed that the ill effects of air pollution as seen in the external environment are often the major consideration. The pollution and ailments of congestion within one’s house environment goes unrecognized until an actual physiological ailment is seen to be incurred.
The EPA [ Environmental Protection Agency, this is a United States Federal Agency committed to protecting the environment] in its report discusses how the Indoor air quality causes discomfort to people. Indoor air quality is seen to decrease because of tobacco smoke, household products such as asbestos and more (Medline Plus, 2014). People living in such indoor air might be affected with allergies or might suffer wheezing and other symptoms. In addition a person who already has allergies might feel that the indoor air is actually causing them to feel sicker. This could be because of physiological reasons or it could be because of psychological reasons, either way there is a deterrent to good health because of the air quality (Graudenz et al, 2006). Sometimes people of a building fall sick at the same time, this is called the sick building syndrome. Some of the causes of this sick building syndrome are that of having inadequate ventilation where the building standards are not met and the HVAC [ Heating, Ventilating and Air-conditioning for environmental comfort, these are standardized regulations] system is inadequate. There can be chemical contaminants present from other indoor sources and chemical or biological components from outdoor sources could also be present (EPA, 1991). While some people might feel better when they move out of their homes, others might experience worsening symptoms. Symptoms such as allergic reactions, wheezing or shortness of breath might be cured by treating the symptom, but the accumulation of ill health from the pollutants that are present in the building could cause problems later on. Chronic wheezing or asthma could lead to lung damage and makes the person susceptible to secondary infections like that of pneumonia, tachycardia because of increased heart output among others (Shamblin, et al, 2012).