https://wikimd.org/index.php?action=history&feed=atom&title=Natural_gasNatural gas - Revision history2026-04-27T02:47:39ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=Natural_gas&diff=2170145&oldid=prevPrab at 19:02, 15 December 20202020-12-15T19:02:36Z<p></p>
<p><b>New page</b></p><div>Natural gas are a type of natural resource which are hydrocarbons that exist as a gas or vapor at ordinary pressures and temperatures. <br />
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[[Methane]] is the most important, but [[ethane]], [[propane]], or others may be present.<br />
[[File:Natural gas production world.PNG|alt=Natural gas production world|thumb|Natural gas production world]]<br />
==Fossil energy==<br />
Natural gas is a fossil energy source that formed deep beneath the earth's surface and contains many different compounds. <br />
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==Methane==<br />
The largest component of natural gas is methane, a compound with one carbon atom and four hydrogen atoms (CH4). <br />
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==Formation==<br />
Millions of years(or hundreds of millions) ago and over long periods of time, the remains of plants and animals (such as diatoms) built up in thick layers on the earth’s surface and ocean floors, sometimes mixed with sand, silt, and calcium carbonate. <br />
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Gradually, these layers were buried under sand, silt, and rock. Pressure and heat changed some of this carbon and hydrogen-rich material into coal, some into oil (petroleum), and some into natural gas.<br />
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==Types of natural gas==<br />
In some places, natural gas moved into large cracks and spaces between layers of overlying rock. <br />
[[File:Darvasa gas crater panorama crop.jpg|alt=Darvasa gas crater|thumb|Darvasa gas crater]]<br />
===Conventional natural gas===<br />
The natural gas found in these types of formations is sometimes called conventional natural gas. <br />
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===Shale gas===<br />
In other places, natural gas occurs in the tiny pores (spaces) within some formations of shale, sandstone, and other types of sedimentary rock. This natural gas is referred to as shale gas or tight gas, and it is sometimes called unconventional natural gas. <br />
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===Associated natural gas===<br />
Natural gas also occurs with deposits of crude oil, and this natural gas is called associated natural gas. <br />
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===Coalbed methane===<br />
Natural gas deposits are found on land, and some are offshore and deep under the ocean floor. A type of natural gas found in coal deposits is called coalbed methane.<br />
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==Health and environmental concerns==<br />
The natural gas industry is a significant source of emissions of methane, a potent greenhouse gas with a global warming potential more than 25 times that of carbon dioxide.<br />
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==Volatile organic compounds==<br />
It also is the largest industrial source of emissions of volatile organic compounds (VOCs), a group of chemicals that contribute to the formation of ground-level ozone (smog). Exposure to ozone is linked to a wide range of health effects, including aggravated asthma, increased emergency room visits and hospital admissions, and premature death.<br />
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In addition to helping form ozone, these VOC emissions from the oil and gas industry include air toxics such as benzene, ethylbenzene, and n-hexane, also come from this industry. Air toxics are pollutants known, or suspected of causing cancer and other serious health effects.<br />
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[[Category:Natural gas| ]]<br />
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[[Category:Fuel gas]]</div>Prab