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Freshwater part 3 journey in vast lakes

Most rivers drain into the sea, but some end their journey in vast lakes. Worldwide lakes hold twenty times more fresh water than all the rivers. The East African Rift Valley holds three of the world's largest: Malawi, Tanganyika, and Victoria. Lake Malawi, the smallest of the three, is still bigger than Wales. Its tropical waters teem with more fish species than any other lake. Most rivers do not end in lakes but continue their journey to the sea. To date over 3,000 species of their fish have been described - more than in the whole of the Atlantic Ocean. The world's largest lake - Baikal in Eastern Siberia. 400 miles long and over a mile deep, Baikal contains one fifth of all the fresh water found in our planet's lakes and rivers. For five months of the year it's sealed by an ice sheet over a metre thick. Baikal is the oldest lake in the world and, despite the harsh conditions, life flourishes here in isolation. 400,000 greater snow geese flock to the estuaries along the Atlantic coast of the United States to rest and refuel on their long migratory journeys. This is the end of the river's journey. Collectively they've worn down mountains and carried them to the sea. And all along the way, their fresh water has brought life and abundance to planet Earth.





 
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Planet Earth From Freshwater
Planet Earth Freshwater
  2 source of drinking water
2 source of drinking water
  3 journey in vast lakes
3 journey in vast lakes
  4 can support fresh water
4 can support fresh water