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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.
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]
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 ...
Water vapor concentration for this gas mixture is 0.4%. Water vapor is a greenhouse gas in the Earth's atmosphere, responsible for 70% of the known absorption of incoming sunlight, particularly in the infrared region, and about 60% of the atmospheric absorption of thermal radiation by the Earth known as the greenhouse effect. [25]
Map of the original monument boundaries (March 2017) Bears Ears National Monument and the Dark Canyon Wilderness from ISS, 2023. The monument is co-managed by the BLM and the USFS (the Monticello Unit of the Manti-La Sal National Forest), [12] along with a coalition of five local Native American tribes [13] —Navajo, Hopi, Ute Mountain Ute, Ute Indian Tribe of the Uintah and Ouray Reservation ...
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.
The ocean contains 97% of Earth's water, and oceanographers have stated that less than 100% of the World Ocean has been explored. [5] The total volume is approximately 1.35 billion cubic kilometers (320 million cu mi) with an average depth of nearly 3,700 meters (12,100 ft).