Examples from the Web for methane
That can happen, according to the report, when (flammable) methane leaks out of fracking wells and into drinking water.
Methane could be produced by microbes on Mars, too, if they exist in enough numbers.
Methane (chemical formula CH4) is one of the simplest hydrocarbons, which literally means “containing hydrogen and carbon.”
Methane is a familiar chemical, whether you know it by that name or not.
Perhaps the mysterious Martian methane, and its strange fluctuations, are part of that story.
An example of a hydrocarbon or compound of carbon and hydrogen, is marsh gas (methane) or firedamp, CH4.The Chemistry of Hat Manufacturing|Watson Smith
In the case of methane, CH4, the formula is not true, but the error is not great enough to seriously affect the result.
Now Jon flapped his slitherers down and began to glide away from the methane falls and up the nearly vertical mountain slope.Captives of the Flame|Samuel R. Delany
For a moment let us turn back to the commencement of the chapter to the subject of methane.The Romance of War Inventions|Thomas W. Corbin
Aluminum carbide yields alumina and methane (marsh gas), another hydro-carbon, the chief constituent of natural gas.