Natural clean black water of the Sekonyer Kanan tributary flowing into muddy water of the main Sekonyer River polluted by illegal gold mining, Borneo

- Image ID: DG5ETW
Natural clean black water of the Sekonyer Kanan tributary flowing into muddy water of the main Sekonyer River polluted by illegal gold mining, Borneo
Rosanne Tackaberry / Alamy Stock Photo
Image ID: DG5ETW
The light-coloured muddy water of the main Sekonyer River is polluted by mining operations upstream and contains heavy metals including mercury. The cleaner Sekonyer Kanan tributary water is naturally dark coloured because of dissolved organic matter and acids.
Location: Tanjung Puting National Park boundary, Central Kalimantan, Borneo Indonesia