Green sulfur bacteria appear in Lake Matano, Indonesia, at a depth of approximately 110–120 meters.
Despite Lake Matano's remote location, it is the site of PT Vale Inco Indonesia Tbk (formerly PT. INCO), one of the largest nickel mines in the world, which carries out strip mining in the surrounding rainforest.
Located in the Verbeek mountains, Soroako is surrounded by three natural lakes: Lake Matano, Lake Towuti and Lake Mahalona.
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