Tina Arrowood : A circular economy for salt that keeps rivers clean

Tina Arrowood·TED@DuPont
A circular economy for salt that keeps rivers clean
Summary
I didn’t know that salt had needed for icy roads because of using salt to deice roads. However, it ends up in freshwater rivers and makes their water undrinkable.
Furthermore, other industries seem to drain salty industrial wastewater in the rivers.

The speaker tells us that those industrial-water users' practice has to change soon.
Reuse water more not to use clean water every time. 1)
Remove Salt in water before draining. 2)
Use recycled salt as our sources. 3)

And then the study seems to find that with technology, membranes that can separate salt and water can work well. Not only salty water but also industrial wastewater has to be more recycled.
For keeping rivers clean, circulation should be thought seriously.