¹ Video projection of boiling highly saturated salt water, until the water is completely evaporated.
² Salt is essential for life in general. Sodium ions are used by some plants but they are crucial for animals - they are used to generate nerve impulses and to maintain electrolyte and fluid balance in the body.
³ Halotherapy is an alternative treatment that involves breathing salty air.
4 Thalassotherapy - is a therapeutic use of sea water or systematic exposure to shore climate.