biogas
type: Concept
broader: natural gas
preferred label: بیوگاز @fa

natural gas
type: Concept
alternative label: gas, natural
broader: fuels
narrower: biogas
preferred label: گاز طبیعی @fa
related: methane

fuels
type: Concept
narrower: natural gas
preferred label: سوخت @fa

methane
type: Concept
preferred label: متان @fa
related: natural gas