What is another word for swamp gas?
Pronunciation: [swˈɒmp ɡˈas] (IPA) 
Swamp gases are unpleasant and potentially dangerous gases that are often found in wetland areas. These gases are typically a mixture of methane, carbon dioxide, and other volatile organic compounds. Synonyms for swamp gas could be marsh gas, bog gas, mire gas or fen gas. These gases are formed due to the decomposition of organic matter in stagnant water. They can be released into the air when the water is disturbed, such as by a passing animal or human movement. Although generally not harmful in small amounts, large concentrations of swamp gases can pose a serious health risk and should be avoided.
