Natural gas is a hydrocarbon gas mixture consisting primarily of methane, but also including ethane, propane and other light hydrocarbons. It is formed as a result of natural processes such as anaerobic decomposition of organic material by microorganisms in the absence of oxygen. Natural gas is used as a fuel for heating homes, generating electricity, cooking, and various industrial applications due to its clean burning properties and high energy content. It is also used as a feedstock for producing chemicals such as fertilizers, plastics, and pharmaceuticals.