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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.
Most of Earth's surface is ocean water: 70.8% or 361 million km 2 (139 million sq mi). [96] This vast pool of salty water is often called the world ocean, [97] [98] and makes Earth with its dynamic hydrosphere a water world [99] [100] or ocean world. [101] [102] Indeed, in Earth's early history the ocean may have covered Earth completely. [103]
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 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).
The lake covers nearly 14,000 acres (57 km 2) with 190 miles (310 km) of shoreline touching three counties. [6] The lake is an average of 23 feet (7.0 m) deep with an estimated volume of 1.35 × 10 10 cubic feet (3.82 × 10 8 m 3 ).
NO. 725 OLD BEAR VALLEY DAM - In 1884 Frank Brown built an unusual dam here to supply irrigation water for the Redlands area. The single-arch granite dam formed Big Bear Lake, then the world's largest man-made lake. Engineers claimed the dam would not hold, and declared it "The Eighth Wonder of the World" when it did.
Christchurch has one of the highest-quality water supplies in the world, with its water rated among the purest and cleanest in the world. [ 330 ] [ 331 ] Untreated, naturally filtered water is sourced, via more than 50 pumping stations surrounding the city, from aquifers emanating from the foothills of the Southern Alps . [ 332 ]
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 ...