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'''Methane''' is a [[chemical]] substance CH<sub>4</sub> found in a high percentage in [[natural gas]]. It is also a common byproduct of [[digestion]] in human and [[animal]]s. It is also known as "marsh gas" or "swamp gas" because it is produced when vegetation decomposes in water.
'''Methane''' is a [[chemical]] substance CH<sub>4</sub> found in a high percentage in [[natural gas]]. It is also a common byproduct of [[digestion]] in human and [[animal]]s. It is also known as "marsh gas" or "swamp gas" because it is produced when vegetation decomposes in water. Methane is lighter than air, and is extremely volatile. It tends to dissipate quickly, but a large enough concentration can displace breathable air.
Colorless and odorless, methane is deadly in high concentrations, and is one of the "[[greenhouse gas|greenhouse gases]]".
Colorless and odorless, methane is deadly in high concentrations, and is one of the "[[greenhouse gas|greenhouse gases]]".