Methane gas, also known as natural gas, is a colorless and odorless gas that is the primary component of natural gas, which is a fossil fuel. Methane is a hydrocarbon, which means it consists of hydrogen and carbon atoms, with a chemical formula of CH4.
Methane is formed through the decomposition of organic matter, such as dead plants and animals, in an oxygen-free environment. It is also produced by some natural processes, such as wetland ecosystems, and can be found in coal seams and shale gas formations.
Methane gas has several applications, including as a fuel for heating and electricity generation, as a transportation fuel, and as a feedstock for the production of chemicals and fertilizers. It is considered a relatively clean-burning fossil fuel, as it produces less carbon dioxide and other pollutants than coal or oil when burned.