smoke and ash from the volcano sinabung is spread along the side

archipelago ash asia barisan biodiversity borneo bornese climate cloud coastal danger deforestation dust earthquake ecoregions ecosystem ecosystems environmental equator eruption fire greater heritage humidity indonesia indonesian islands jungle kalamanthana kalimantan karimata kepulauan kumai malay medan melayu natural north oceania phenomena problems rainforest republik sinabung smoke southeast steam strait stratovolcano sumatra sunda tourism trees tropical varuna volcanic volcano