Salt is of crucial importance for life. It has served as money, played a vital part in the religious rituals of many cultures and has been the cause of bitter warfare.
The Salar de Uyuni, in Bolivia, is the largest salt desert in the world and is located at an altitude of 12000 feet. The Quechas Indians have harvested the salt since centuries. The glare on this huge white plain is extreme.
To nourish their animals, the Ethiopian Borenas, near the Somalia border, extract a valuable but muddy black salt from the deep crater lake of a volcano. The water is as thick as oil and acidic, and yet the workers dive here daily.