[29.11.2019, 17:24:54] Sylvia Borin: It's roughly
1.332 billion cubic kilometers of water on earth
(326 million cubic miles),
according to the U.S. Geological Survey. [29.11.2019, 17:44:02] Sean: How do they know that?
[29.11.2019, 17:48:17] Sylvia Borin: Some 72 percent of Earth is covered in water,
97 percent is salty ocean water and not suitable for drinking.Up to 60% of the human adult body is water.
[29.11.2019, 17:48:43] Sylvia Borin: The brain and heart are composed of 73% water.
The lungs are about 83% water.The skin contains 64% water, muscles and kidneys are 79%.
Even the bones are watery: 31%