They combine to form Natural Gas Specialists when the proper ratios are used. Methane, ethane, butane, and propane are the first four alkanes and are collectively known as the "four natural gases".
Why do you use the term "natural gas"?
Definition: A mixture of hydrocarbon-rich gases makes up natural gas. Methane, nitrogen, carbon dioxide, and other gases are all naturally occurring in the atmosphere. Deep within the earth, near other beds of solid and liquid hydrocarbons like coal and crude oil, are natural gas reserves.