Human methane? Come on Dave, use your words.

Farts, passed gas, broken wind, cut cheese, trumps (for Brits).

I am sure the Brits have another 10 words for it.

The second point is "are farts delicate?" I am a mother of a teenager ( a
boy), and human methane is never delicate.

I think people have measured the C and maybe the H isotopes of farts, but
if they haven't I am sure you could do a good job with a structured study
on the subject. I can truthfully say we have not attempted the measurement
at the Carnegie, although it has been discussed.

Marilyn, A lady, and we do not emit human methane or anything else similar
to it.

> A delicate question here. Does anybody know of data for 13c compositions
> of
> methane from human emissions? I am writing up data for CO2 and methane
> isotopes of cave air and I am seeking alternative explanations for one or
> two 'anomalous' data points with methane d13C as light as -53 permil.
> Cave
> air methane is otherwise significantly heavier than background atmosphere
> due to microbial oxidation. Methane emitted from mammals is normally
> around
> 30 permil lighter than food intake but wondered if any data existed for
> specifically for the human species....
>
> Thanks
>
> dave
>
>
> --
> David Mattey
> Geology Department,
> Royal Holloway College,
> University of London
> Egham,
> Surrey TW20 0EX
>
> Telephone       01780  443582 (Secretary)
>                        443587 (Direct line)
>                        443629 (Stable Isotope Laboratories)
>                 07780  697564 (Mobile)
>
> www.gl.rhul.ac.uk/silab
>