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Rio Negro, Brazil A unique tributary of the Amazon, the Rio Negro is the largest blackwater river in the world, with the dark coffee-colored waters containing high levels of tannins creating a unique ecosystem for the wildlife it supports. |
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Rio Negro, Brazil A unique tributary of the Amazon, the Rio Negro is the largest blackwater river in the world, with the dark coffee-colored waters containing high levels of tannins creating a unique ecosystem for the wildlife it supports. |
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