Methane is Not Just for Global Warming Anymore

I am concerned today with CH4,
It's methane in the common English tongue.
On Earth we seek to rid ourselves of or
At least reduce its source in farts and dung.
The EPA, it plans a new cow tax
(Or "permit fee" to use its preferred term).
It sucks, but, as they say, well them's the facts.
So as I say, I'm quite concerned to learn
Of methane's being detected out on Mars.
A sign of life, the optimistic say.
I'm not so sure: the creation of czars
Would seem to be the habit of the day.
A Methane Mars Czar really can't be long
In coming. Until then, there's Bowie's song.