Warsaw’s Water Monitoring Muscles

Massimo (@Rainmaker1973) Tweeted:
The water quality in Warsaw, the capital city of Poland, is monitored by clams. If the water gets too toxic, they close, and the triggers shut off the city’s water supply automatically [read more: https://t.co/CN82xLjUqE%5D [documentary trailer: https://t.co/KYnftvOBS5%5D https://t.co/gYgxJZhNeY
https://twitter.com/Rainmaker1973/status/1439582548523421696?s=20

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