• Methane
  • Methane (CH4) is a colorless, odorless, flammable, greenhouse gas. It is released naturally into the air from marshes, swamps, rice fields, ruminant animals (such as cattle), and sewage sludge. CH4 is also released from methane-producing bacteria (methanogens) that live in anaerobic places. [Solar Energy; v52n6; 467-477; 1994.] [Air, The Nature of Atmosphere and the Climate; Michael Allaby; pages 39,40; 1992; Facts on File; New York] [Dictionary of Science; R.K. Barnhart; page 398; 1986; Houghton Mifflin Company; Boston.]
Abstract from DBPedia
    Methane (US /ˈmɛθeɪn/ or UK /ˈmiːθeɪn/) is a chemical compound with the chemical formula CH4 (one atom of carbon and four atoms of hydrogen). It is a group 14 hydride and the simplest alkane, and is the main component of natural gas. The relative abundance of methane on Earth makes it an attractive fuel, though capturing and storing it poses challenges due to its gaseous state under normal conditions for temperature and pressure. In its natural state, methane is found both below ground and under the sea floor. When it finds its way to the surface and the atmosphere, it is known as atmospheric methane. The Earth's atmospheric methane concentration has increased by about 150% since 1750, and it accounts for 20% of the total radiative forcing from all of the long-lived and globally mixed greenhouse gases (these gases don't include water vapor which is by far the largest component of the greenhouse effect). Methane breaks down in the atmosphere and creates CH3· with water vapor.

    メタン(独: Methan、英: methane)は最も単純な構造の炭化水素で、1個の炭素原子に4個の水素原子が結合した分子である。分子式は CH4。和名は沼気(しょうき)。CAS登録番号は [74-82-8]。カルバン (carbane) という組織名が提唱されたことがあるが、IUPAC命名法では非推奨である。


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