Air quality is one of the most important factors of the indoor environment, as poor quality has high negative short-term or long-term effects on the people in the room. However, since people today spend almost 90% of their time indoors and the air there is in most cases more polluted than outside, it is necessary to provide effective measures for adequate quality. In my thesis, I made an overview of the standards in the mentioned field, investigated the harmful effects of the main pollutants on the health of students and employees in twelve elementary schools, where the measurements were carried out, and gave measures for improvement.
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