... metropolitan areas complained of narrowness of their houses in the 1960 s. At the time, airtight houses started to be built in urban area, and air pollution due to a lack of fresh air because of the ... Sensors Capable of Measuring and Evaluating Indoor Air Quality.Indoor Environ., 1, 27–34 (in Japanese).126)Kishi, R., Saijo, Y., Kanazawa, A. , Tanaka,M., Yoshimura, T., Chikara, H., Takigawa, T.,Morimoto, ... (in Japanese).113)Sakai, K., Kamijima, M., Sh ib ata, E., Ohn o, H. and Nakajima, T. (2009) Annual transition and seasonalvariation of indoor air pollution levels of 2-ethyl-1-hexanol in large-scale...