... 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 ... with the use of coaland other fuels for heating and cooking.52)Biological PollutantsDander, mold, dust, and other or ganisms car-ried into by animals and people a re biological air pollutants ... effects of nanoparticles and nanomaterials (II) Methods forMeasurement of Nanoparticles and Their Presencein the Air. Jpn. J. Hyg., 63, 663–669 (in Japanese).119)Hirose,A.and Hirano, S. (2008)...