Մեթան ածուխ գազ է, թե բնական գազ

Methane is a form of natural gas, which is composed mainly of alkanes, including methane, ethane, պրոպան, and butane, with methane being the predominant component.

Ի հակադրություն, coal gas is a gas fuel consisting of a mixture of combustible substances, with carbon monoxide being its primary constituent.