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The water canary helps to analize via twitter and in real time the health of the rivers, sewage and urban rivers around the world.
Yair Y
Yair Y May 05, 2013
The water canary helps to analize via twitter and in real time the health of the rivers, sewage and urban rivers around the world.

I've seen these sensors...

Often 1
Occasionally 2
Rarely 2
Never 6
What is it? 2
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