The rivers of Africa South of the Sahara are useful for internal navigation but have obstacles to connections with the coast.

Question

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Many rivers in Africa south of the Sahara, such as the Congo and Niger, have sections that are navigable and useful for internal transportation. However, they often have natural obstacles like waterfalls, rapids, and seasonal fluctuations in water levels that hinder direct access to the coast and limit their utility for external trade and navigation.

The Rivers of Africa South of the Sahara Are Useful