The relevant bit of the video, to this thread (4.08 to 10min), is that doubling of methane , would only result in a rise of 0.012 degrees Celsius.The water vapour "issue" has been ditched by the great and the good because there’s no money in it, but I’m sure you knew that anyway.
The video says it would take 300 years , to double , at current increments.Doubling of methane from what source?
By source I meant atmospheric (ie ruminants/rice etc) rather than fossil. Fundamental difference, but hey ho.The video says it would take 300 years , to double , at current increments.
I don't know if the different isotopes of Carbon( C12,C13,C14 etc) cause different amounts of warming , but we all know methane from ruminants hasn't changed much over the years.