List two ways that natural gas is formed.

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List two ways that natural gas is formed.



Answer: Natural gas is produced as a by-product when bacteria decomposes organic material under anaerobic conditions, producing primarily methane (CH4). Production of methane gas from decomposition of organic matter by bacteria in anaerobic conditions is called biogenic gas. Alternatively, natural gas can also be formed as the result of compression and heat deep underground. This is referred to as thermogenic gas.

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