on sulfur prior to development of the Frasch process for mining sulfur from salt domes.

Sulfur mining in Indonesia is sometimes done for low pay, by hand, without respirators or other protective equipment.

In April 2006 fumarole emissions killed three ski-patrol workers east of Chair 3 at Mammoth Mountain Ski Area in California. The workers were overpowered by an accumulation of toxic fumes (a mazuku)

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