●Unhealthy houses

　■Indoor air pollution is severe and it generates the dew condensation, which is subject for ticks and mold in a large quantity.
　　 →It becomes the cause of allergy.

　■The house which has a difference of temperature in it.
　　 →In case people moves in the inside of house, it becomes the cause of apoplexy or a heart attack(heat shock).

　■The house which emits toxic substances, such as hormone aldehyde, beyond the standard.
　　 →It becomes the cause of sick house symdrome.

　■ The house which consumes a lot of energy and has enviromantal pollution also when it is pulled down.
　　→ It will lead to environmental destruction.

Then, What is healthy house?