Ключевые слова: acid, action, asia, backgrounds, caldera, condensation, crater, danger, duct, dust, erupting, ethnicity, extreme, feature, fog, fracture, fumarole, gas, geological, geology, ijen, indonesia, java, kawah, landscape, male, manual, miner, mineral, mining, mountain, natural, nature, people, rock, rough, semeru, smoke, southeast, stone, sulphur, tourism, travel, volcanic, volcano, worker, yellow,