Natural gas derives from animal and plant matter that was heated and pressurized in earth’s layers (hence why it is referred to as “fossil fuel”). It is generally made up of methane, ethane, hexane, propane, heptanes, butane, and pentane; however, gas companies purify it until only methane is left. That way the gas used for heating burns cleanly. Methane is considered a clean fuel because compared to coal and oil, it is less chemically complex, releasing only carbon dioxide and water va...
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