The concentrated salt water is pumped back into the sea. Doesn't seem to be too damaging to the environment. See: https://theconversation.com/desal-plants-migh

The concentrated salt water is pumped back into the sea. Doesn't seem to be too damaging to the environment. See: https://theconversation.com/desal-plants-might-do-less-damage-to-marine-environments-than-we-thought-103593 https://theconversation.com/desal-plants-might-do-less-damag...