Swamp gas is a gas which develops by rottening of organic matter with no presence of air at all, e.g. at bottom of the swamp. The chief component is methane (CH4).
Generalic, Eni. "Swamp gas." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.
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