Not necessarily, it also comes from natural gas: https://www.pnas.org/content/118/32/e2107632118#:~:text=Methane%20cannot%20only%20be%20produced,and%20released%

Not necessarily, it also comes from natural gas: https://www.pnas.org/content/118/32/e2107632118#:~:text=Methane%20cannot%20only%20be%20produced,and%20released%20when%20it%20thaws https://www.pnas.org/content/118/32/e2107632118#:~:text=Meth....