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[[ | {{Status|Canon}} | ||
{{References}} | |||
{{Wikipedia|Methane}} | |||
[[File:HW2_MethaneFirebase.png|thumb|300px|A UNSC [[Firebase]] covered in methane.]] | |||
'''Methane''' is a chemical compound with the molecular formula CH<sub>4</sub>. It is the simplest alkane, and the principal component of natural gas. Methane's bond angles are 109.5 degrees. Burning one molecule of methane in the presence of [[oxygen]] releases one molecule of CO<sub>2</sub> (carbon dioxide) and two molecules of [[Water|H<sub>2</sub>O]]. | |||
Methane is a relatively potent greenhouse gas with a high global warming potential of 72 (averaged over 20 years) or 25 (averaged over 100 years). Methane in the atmosphere is eventually oxidized, producing carbon dioxide and [[water]]. As a result, methane in the atmosphere has a half life of seven years (every seven years, the amount of methane halves). Methane's relative abundance and clean burning process makes it a very attractive fuel. However, because it is a gas (at normal temperature and pressure; see STP), methane is difficult to transport from its source. In its natural gas form, it is generally transported in bulk by pipe or LNG carriers. | |||
The only known species that uses methane instead of oxygen in respiration are the [[Unggoy]]. Their home planet, [[Balaho]] has an atmosphere which is mostly methane. Because of this, the Unggoy use [[methane tank]]s and breathing apparatus when operating outside their native environment. While methane is needed for a Grunt to live, Grunts enjoy another gas, [[Wikipedia:Benzene|benzene]], as a drug, calling it "lovely lung gold" and "sacred aromatic".<ref>'''[[Halo: Ghosts of Onyx]]''', ''page 237''</ref> Additionally, the Unggoy frequently mix narcotics called [[infusion]]s into their methane supplies.<ref name="CH">'''[[Halo: Contact Harvest]]''', ''pages 150-151''</ref> The lungs of the [[SPARTAN-IV Program|SPARTAN-IVs]] are augmented to process a variety of toxins and foreign gases, potentially allowing them to breathe methane for around an hour.<ref>'''[[Halo: Initiation]]''', ''Issue #2''</ref> | |||
Methane is | Methane is highly flammable, and as such the Covenant's methane containers - including the Unggoy's methane tanks - explode when shot. During the [[Second Ark Conflict]], the Unggoy [[Yapyap]] would utilise Methane as a weapon, deploying it from [[Methane Wagon]]s to choke enemy troops and enhance his own Unggoy forces.<ref>'''[[Halo Wars 2]]'''</ref> | ||
During the [[Battle for Zeta Halo]], the [[Banished]] troops stationed at the [[Redoubt of Sundering (location)|Redoubt of Sundering]] used methane gas to execute human [[Prisoner of war|POWs]] they deemed to be too weak or of no value.{{Ref/Novel|Id=RP160|RP|Page=160}} | |||
==Gallery== | |||
<gallery> | |||
File:HR-MethanePump-Render.jpg|''Halo: Reach'' render of a Methane pump. | |||
</gallery> | |||
[[Category:Chemical | ==Sources== | ||
{{Ref/Sources}} | |||
[[Category:Chemical compounds]] |