Cows and ruminants have been roaming the Earth for a long time. If they were a huge contribute to global warming, it would be pretty hot already. Focusing on methane emission omits the fact that grasslands absorb carbon dioxide from the atmosphere, and that a properly managed grassland actually sequesters carbon dioxide. Whereas factory farming breaks this cycle. We need to think in more nuanced ways if we’re going to solve global warming.
https://www.agriculture.com/livestock/cattle/methane-and-gra...