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A colorless, odorless gas with a wide distribution in nature. It is the principal component of natural gas, a mixture containing about 75% CH4, 15% ethane, and 5% other hydrocarbons, such as propane and butane. Methane atmospheres are the standard for Orceronian species, such as the Hemmoians and the Orcs.

Also found in abundance in the atmospheres of some gas giants.