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Most water in Earth's atmosphere and crust comes from saline seawater, while fresh water accounts for nearly 1% of the total. The vast bulk of the water on Earth is saline or salt water, with an average salinity of 35‰ (or 3.5%, roughly equivalent to 34 grams of salts in 1 kg of seawater), though this varies slightly according to the amount of runoff received from surrounding land.
They contain 21% of the world's surface fresh water by volume. [ 1 ] [ 2 ] [ 3 ] The total surface is 94,250 square miles (244,106 km 2 ), and the total volume (measured at the low water datum) is 5,439 cubic miles (22,671 km 3 ), [ 4 ] slightly less than the volume of Lake Baikal (5,666 cu mi or 23,615 km 3 , 22–23% of the world's surface ...
The world-average ecological footprint in 2016 was 2.75 global hectares per person (22.6 billion in total). With a world-average biocapacity of 1.63 global hectares (gha) per person (12.2 billion in total), this leads to a global ecological deficit of 1.1 global hectares per person (10.4 billion in total). [1]
The entire ocean, containing 97% of Earth's water, spans 70.8% of Earth's surface, [8] making it Earth's global ocean or world ocean. [23] [25] This makes Earth, along with its vibrant hydrosphere a "water world" [43] [44] or "ocean world", [45] [46] particularly in Earth's early history when the ocean is thought to have possibly covered Earth ...
The home and colonial populations of the world's empires in 1908, as given by The Harmsworth Atlas and Gazetteer. Because of the trend of increasing world population over time, absolute population figures are for some purposes less relevant for comparison between different empires than their respective shares of the world population at the time ...
Most of Earth's surface is ocean water: 70.8% or 361 million km 2 (139 million sq mi). [97] This vast pool of salty water is often called the world ocean, [98] [99] and makes Earth with its dynamic hydrosphere a water world [100] [101] or ocean world. [102] [103] Indeed, in Earth's early history the ocean may have covered Earth completely. [104]
Rain water flows off Uluru along channels, marked by dark algae, forming small ponds at the base. The Mutitjulu Arkose is about the same age as the conglomerate at Kata Tjuta, and has a similar origin, despite the different rock type. It is younger than the rocks exposed to the east at Mount Conner, [46] and unrelated to them.
In 1970, American Realty Service Corporation of Memphis, Tennessee, began the development of Lake Waynoka by buying farm land, damming the headwaters of Straight Creek, a tributary of the Ohio River, and dividing the land into lots roughly one-third of an acre in size. American Realty also created other lake communities.