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In Brazil, in the region I was born, over 30% of the ppl have no water to drink bc of drought. So here's what they're doing, they build a low-cost desalinization device (about $60) composed by concrete and glass, using only the sun as force.
They work through condensation and the salt residues are donated to salt companies, which in turn have to extract less salt from the sea.
Given a rough analysis of the salt residues, which i suppose include much more than Na and Cl, I am pretty sure we could build a synthetic molecule that binds and neutralize their potential negative effects.
There are 35g of salt for each 1l of sea water, which means, according to gemini, we would need 9,14 quadrillions of water liters to equal the salt consumption worldwide, per year. So, assuming we got 1/3 of the water consumed from the oceans (1,53 quad), we would still generate less than enough salt demand worldwide (320 mi tons).
I calculated all this only to find out 1.53 quad over 10 years represents 0.1% of sea level. fuck 1 reply
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