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The natural environment encompasses all living and non-living things occurring naturally. The term is most often applied to the Earth or some part of Earth. This environment encompasses the interaction of all living species, climate, weather, and natural resources that affect human survival and economic activity.
1 The concept of the natural environment can be distinguished by components: Complete ecological units that function as natural systems without massive civilized human intervention, including all vegetation, microorganisms, soil, rocks, atmosphere, and natural phenomena that occur within their boundaries and their nature. Universal natural resources and physical phenomena that lack clear-cut boundaries, such as air, water, and climate, as well as energy, radiation, electric charge, and magnetism, not originating from civilized human activity.
An ocean is a major body of saline water, and a component of the hydrosphere. Approximately 71 of the Earth's surface (an area of some 362 million square kilometers) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas. More than half of this area is over 3,000 meters (9,800 ft) deep.
Average oceanic salinity is around 35 parts per thousand (ppt) (3.5 and nearly all seawater has a salinity in the range of 30 to 38 ppt. Though generally recognized as several 'separate' oceans, these waters comprise one global, interconnected body of salt water often referred to as the World Ocean or global ocean.56 The deep seabeds are more than half the Earth's surface, and are among the least-modified natural environments. The major oceanic divisions are defined in part by the continents, various archipelagos, and other criteria: these divisions are (in descending order of size) the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean and the Arctic Ocean.
The atmosphere of the Earth serves as a key factor in sustaining the planetary ecosystem. The thin layer of gases that envelops the Earth is held in place by the planet's gravity. Dry air consists of 78 nitrogen, 21 oxygen, 1 argon and other inert gases, such as carbon lopez dioxide.
The remaining gases are often referred to as trace gases,12 among which are the greenhouse gases such as water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Filtered air includes trace amounts of many other chemical compounds.
Air also contains a variable amount of water vapor and suspensions of water droplets and ice crystals seen as clouds.
Many natural substances may be present in tiny amounts in an unfiltered air sample, including dust, pollen and spores, sea spray, volcanic ash, and meteoroids.
Various industrial pollutants also may be present, such as chlorine (elementary or in compounds fluorine compounds, elemental mercury, and sulphur compounds such as sulphur dioxide SO2. Suelos pdf converter 553 brown saddle esxi.5 configuration minimum zoons of zonen gun3 mouse fluctuating line deutschland university of colorado cross country coaches national championships sindicatele republica moldova news quantore relatiedagen 2013 dodge captain kidd 1945 trailer cooking a stewing chicken natural environment download.
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