Methane isn't as bad or terrible as it's made out to be https://www.alltech.com/features-podcast-blog/frank-mitloehn...

And the measurements for beef in regard to climate change was a global average, using Brazil burning down Amazon forests. Unless you're eating that beef you can find beef that is carbon neutral or even a carbon sink. It uses up land we can't grow crops on and without meats we wouldn't have enough.