With most of the world living in cities and growing villages, people tend to spend the majority of their time indoors. When not at home, we are working, learning, or even engaging in fun activities in enclosed, built settings. All in all, 90% of our time is occupied inside. It is therefore essential to ensure a comfortable, productive, and healthy indoor environmental quality by following well-regulated parameters and design practices that consider temperature, lighting, noise pollution, proper ventilation, and the quality of the air we breathe. The latter is especially important, since contrary to what we might think, air pollution is much higher indoors than outdoor. Indoor air not only can cause discomfort and affect productivity but it could very well become a potential threat for occupant's health as it could hold a wide range of airborne and gaseous pollutants including volatile chemicals, particles, and biological contaminants. These elements tend to manifest in our immediate surroundings, embedded in many construction, finishing, or even daily use household materials. Increased levels of exposure can cause health issues such as asthma, infections, and intoxication. In fact, almost half of all respiratory illnesses are caused or aggravated by poor indoor air quality.
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