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[1] https://www.mashed.com/221536/the-real-difference-between-table-salt-and-sea-salt/

[2] https://en.wikipedia.org/wiki/Salt

[3] https://en.wikipedia.org/wiki/File:Sodium-chloride-3D-ionic.png

[4] https://commons.wikimedia.org/wiki/File:Sodium_chloride_crystals,_light_microscopy.jpg

[5] http://www.todayifoundout.com/index.php/2014/01/fascinating-early-history-salt/

[6] https://en.wikipedia.org/wiki/List_of_countries_by_salt_production

[7] https://www.statista.com/statistics/1061321/global-consumption-of-salt-by-country/

[8] https://en.wikipedia.org/wiki/Salt#Sodium_consumption_and_health