Can throwing salt into the ocean effect the ecosystem?

My mom and I were talking about how to make freshwater from saltwater, and got into an argument. The scenario is, a town has been taking saltwater and getting fresh water from it, so now they have a whole lot of salt left behind from extracting it. They have nothing to do with the salt, so they throw all this... show more My mom and I were talking about how to make freshwater from saltwater, and got into an argument.
The scenario is, a town has been taking saltwater and getting fresh water from it, so now they have a whole lot of salt left behind from extracting it. They have nothing to do with the salt, so they throw all this salt back into the ocean.
My mom argues that this would effect the ocean greatly (or at least around this town) and that it would be "polluting the ocean"
I argue that it is not pollution to the ocean..
Who's right? What would be effected? The ecosystem? Anything? Polluting? Eh?
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