Growth inhibitor put into rainwater catch basins will, when it rains, flow out of the rainwater drainage system into the open sea via the Sea of Connections, etc., but by that point they will be diluted to the point of no longer being effective. Therefore, it is considered that there are no adverse effects on the human body or the environment.
Growth inhibitors have not been put into the Water Plaza or the Sea of Connections.

https://www.expo2025.or.jp/en/news/news-20250527-02/ 

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