Natural gas is primarily made up of methane (CH₄), which typically accounts for 80-95% of its composition.

Here's a breakdown of the typical components of natural gas:

* Methane (CH₄): 80-95%

* Ethane (C₂H₆): 1-6%

* Propane (C₃H₈): 0.5-3%

* Butane (C₄H₁₀): 0.5-1%

* Pentane (C₅H₁₂) and heavier hydrocarbons: Less than 1%

* Nitrogen (N₂): 0.5-10%

* Carbon dioxide (CO₂): 0.5-5%

* Hydrogen sulfide (H₂S): Trace amounts

* Helium (He): Trace amounts

The exact composition of natural gas can vary depending on its source. For example, natural gas from different wells or regions may contain different amounts of each component.

It's important to note that natural gas is a fossil fuel, meaning it was formed over millions of years from the decomposition of ancient organic matter.