I can’t believe this is a real problem. Refineries are bombed and stay on fire for days, some places in the world light on fire rubbish all the time, plenty of inefficiencies in heating, transportation, etc.. and the problem is.. cow farts.. yes sure

If you actually measure it, then yes.

https://openknowledge.fao.org/server/api/core/bitstreams/492...

"Total GHG emissions from livestock supply chains are estimated at 7.1 gigatonnes CO2 -eq per annum for the 2005 reference period. They repre- sent 14.5 percent of all human-induced emissions using the most recent IPCC estimates for total an- thropogenic emissions (49 gigatonnes CO 2 -eq for the year 2004; IPCC, 2007)"

Surprisingly there are fewer cows than people, but there's still a billion cows, and a billion of anything adds up quickly.

That's not to say that the other things aren't important as well. Gas flaring from refineries is a pure waste that should be drastically curtailed.