Energy consumption and CO2 emission of building materials or living activities are estimated using building structure and behavior of residences. In our former research, residence has seven variations (Male/female worker, Homemaker, Elementary school/Junior high school, Senior high school, Elderly male/female), and environmental loads of single-person household, parents and children household, elderly household are estimated. Proportion and number of households are important indexes of environmental loads forecast of cities. In addition, age variations of residences are important factor too. In this research, we make new schedules for age variations, and assess environmental loads of houses and a city.
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