Methane is the main component of natural gas.
Methane is the gas found in small quantities in Earth's atmosphere. It is the simplest hydrocarbon, made up of one carbon atom and four hydrogen atoms. It constitutes a powerful greenhouse gas. It is a principal component of natural gas.
Natural gas or fossil gas constitutes a naturally occurring hydrocarbon gas mixture made up primarily of methane, but commonly including varying amounts of other higher alkanes, and a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium.