Footnote
b The second-largest river in terms of volume is the Congo, in west-central Africa. However, two of the Amazon’s principal tributaries, the Negro and the Madeira, pour out as much water each as the Congo.
b The second-largest river in terms of volume is the Congo, in west-central Africa. However, two of the Amazon’s principal tributaries, the Negro and the Madeira, pour out as much water each as the Congo.