Methane concentrations have been accellerating the past decade, so better do it quickly:
Many swamps produce an obnoxiously huge amount of methane, so much so you can smell it everywhere "Swamp gas".
Across the planet we have turned profligate methane producing swampland into land for cities and farmland.
So, we would probably be better off with more of even-though-methane-burping swamplands than less.
Swamp gas has its smell from the associated compounds made with it, just like the methane we use has its stink from Ethanethiol additives, similarly, sulfur based. Still methane though!
You'd need to convince India to stop having so many cows, good luck with that.
https://ourworldindata.org/grapher/cattle-livestock-count-he...