This page is available here: http://www.saltinstitute.org/11.html
Excerpt:
Solar salt is produced by the action of sun and wind on seawater or natural brine in lakes. The water evaporates in successive ponds until the brine is fully concentrated and salt crystallizes on the floor of the crystallizing ponds. Solar salt plants must be located in areas of low rainfall and high evaporation rates, and where suitable low-cost is available.
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