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I think there's enough water in the ocean for us to try

The problem is not killing what lives in said water. And many times we the public become aware something damages the ecosystem when the damage is extensive, and some people never acept the fact, much less any responsibility.

Edit: In this specific case, the best case scenario is saving half the energy expenditure. Larger and more intrusive infrastructure with unknown effects for saving less than half the energy. Let's hope they always use renewables, btw.

I totally agree about the consequences needing to be understood, but in the end, if it comes to this, it’s water. We can’t survive more than 3 days without water. We will boil the oceans if we need to

Humans are part of the ecosystem. Unless you would claim we are not living things.

Dont worry. We are not going drink up the ocean. You will pee it out again.

Where do you imagine the water goes after you pee it out?

Into the sewage treatment plant, which produces almost-drinkable water. That's what we should be reclaiming with reverse-osmosis, but instead we dump it into the ocean.

(The main problem with desalination is not so much that you're taking the water as that you're then dumping concentrated brine into the ecosystem.)