I shared that with a couple of Oil Industry (Exploration Geologists) I know.
A bit of a "Lets put in the cat with the pigeons "
The response was interesting I thought.
Basically, its no surprise..... and have a look at the north sea... you wont see much escaping there.
Also, old coal mines... loads of CH4 leaks I am told. In fact some people are apparently trying to harvest it (No citation)
And the warming permafrost.. It coming out there too as it defrosts... ( I remember that from way back).
And that refuse dumps are using old marine engines to reuse the CH4 coming off them (No citation)
there was a daring suggestion, with a wink, to say that sewage has the same issue, (Methane production) and thats really recycled methane... Just like the oil and gas underground, but on a shorter timescale.
I would love to see if the cows are registered on these satellites.
Not being mentioned seems an omission.