The comment is still useful; if the red legos and the blue legos are different s... | Hacker News

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		aidenn0 on July 5, 2023 \| parent \| context \| favorite \| on: Why is desalination so difficult? The comment is still useful; if the red legos and the blue legos are different sizes it's pretty easy to sort them mechanically.

eutectic on July 5, 2023 [–]

Yes, but there will always be some necessary energy input.

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