ナショナルジオグラフィックのインスタグラム(natgeo) - 5月12日 14時11分

Photo by @michaelchristopherbrown. On the shore of Lake Kivu, one of the African Great Lakes. The lake is in the Albertine Rift and sits upon a rift valley that is slowly being pulled apart, causing volcanic activity in the area, and making it particularly deep: its maximum depth of 480 m (1,575 ft) is ranked eighteenth in the world. The large rift lakes of Africa are the ancient home of great biodiversity; 10 percent of the world's fish species are found there. Lakes Victoria, Tanganyika, and Malawi hold a quarter of the planet's freshwater supply.

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