How clams help keep Polish water clean
How clams help keep Polish water clean
23 January 2021 A WATER PUMP known as Gruba Kaska (Fat Kathy) is a local monument in Warsaw. To get there, you have to walk 300 meters through a slimy tunnel under the Vistula. There you will find eight clams hooked up to computers. They monitor the city’s drinking water. The system is clever. When […]
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