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In The Netherlands they are testing the growth of potatoes on salt water.

So we can also try to adapt to salt water

That's because the salt water penetrates deep into the land due to the topography of the Netherlands.

There Dutch have practiced salt water farming and management for a long time. That said you can't drink salt water ;)

Strictly speaking you can drink salt water. But it wouldn't hydrate you since you would still be thirsty.

C'mon, everyone knows what drinkable water is. You can technically also drink boiling water, or battery acid for that matter, but nobody would classify those under the category "drinkable liquids" which is what we're talking about here.

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