BBC says that the latest IPCC report says methane is responsible for 0.3°C out of 1.1°C of all cumulative warming since pre-industrial times.
According to the IPCC, around 0.3C of the 1.1C that the world has already warmed by comes from methane.
But the thing is I opened the report, Ctrl+F'ed "0.3" and "methane", and didn't find that. Is it true that methane is responsible for nearly one-third of all warming? Did I miss something in the text?
UPD: This is THE report, actually. I didn't find it there too, though (I searched for "0.3°C").
UPD 2: @Deditos found something interesting on page 7.183 (1797)