Asia Indonesia Java Ijen sulphur sulfur volcano volcanism volcanical crater crater lake worker minerals industry work job

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Keywords: arbeit, arbeiter, asia, asien, crater, ijen, indonesia, indonesien, industrie, industry, injurious, java, job, krater, kratersee, lake, mineralien, minerals, schwefel, sulfur, sulphur, ungesund, volcanical, volcanism, volcano, vulkan, vulkanisch, vulkanismus, work, worker