Natural gas, a fossil fuel that results from the decomposition of organic matter over millions of years, is usually trapped within deep rock layers. The primary component is methane (CH₄), often with smaller quantities of propane, ethane, and butane.
In comparison to oil and coal, natural gas releases fewer emissions when burned, emitting less carbon dioxide and nearly no particulate... https://www.kaitiangas.com/what-is-natural-gas-used-for/