Marsh Gas (Methane)
Marsh gas, which is also called methane, is produced by the anaerobic bacterial decomposition of vegetable matter and the rumen of herbivorous animals under water. For a very long time it was considered as having supernatural properties due to its ability to self-ignite, which occurred in marshes and was visible, especially at night. From the viewpoint of chemistry it is the simplest member of the aliphatic or paraffin series of hydrocarbons which is shown by the type of formula CnH2n+2. Its chemical formula is CH4. It can be found abundantly in nature as the chief component of natural gas. The methane content of marsh gas varies between 50 and 80 per cent, but mostly it is around 60 per cent.