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During the winter of 2018-2019, one million tons of salt was applied to icy roads in the state of Pennsylvania alone. Salty runoff from industrial uses like this ends up in freshwater rivers, making their waters undrinkable and contributing to a growing global crisis. How can we better protect these precious natural resources? Physical organic chemist Tina Arrowood shares a three-step river-defense plan to keep salt out of rivers -- and create a circular salt economy that turns industrial byproducts into valuable resources.
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