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Biotope is the movement for small creatures.
There had been lots of pond in the houses of Tokyo till 60's.
There were many ponds in the small shrines in town.
Small insects could move between these ponds with free.
Now almost of people can not afford to make a pond in their house garden.
It is difficult to have a house with garden in the urban area.
According as people lost the religious mind, town government borke
the shrine to make a little park. Owing to the mosquito problem,
in these new park they would not want to make a pond.
Insects lost midway stop for moving and dwelling.
As insects number discreases, other small creatures number would come less
and less. Someday people would look only humanbeing and pet animal.
Without multiplicity of nature in ordinary life, the safeness of environmental
would get strong no more. So the movement of biotope started.
Biotope has small water pods with aquatic plants and has green plant pods.
In the water pod, killifish would clean it and eat mosuquito larvae.
