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> Without knowing exactly what the difference is between wholesale and retail rates, I feel reasonably confident that desalination technology is currently sufficient to avoid civilization collapse and/or war.

The problem is you're gonna need energy to operate these plants and you can't scale stuff up infinitely as the brine will kill off marine life and eventually, the water sources will become so salty that they can not be used for desalination any more: https://www.theguardian.com/global-development-professionals...

Which means, once Peak Salt hits, there will be problems. Oh, and desalinating water for drinking purposes is one thing - using it for agricultural demands is a whole different beast. Egypt, for example, already had problems in 2010, and the issue won't get smaller over the decades. http://edition.cnn.com/2010/WORLD/africa/11/09/egypt.water.s...




"eventually, the water sources will become so salty that they can not be used for desalination any more"

Where do you think the water will go? I mean, if it doesn't end up in the ground, or the ocean...




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