The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
The second step in production is shaping the blocks into rectangles that weigh exactly 7 kgs. This highly qualified job is done exclusively by Afar workers, who are called Hadelimera, the salt cutters. (Photo: Tom Pfeiffer)
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