[spiderfarmer]

The environmental impact of "cow farts" and "cow burps" is largely a myth.

[gbrown]

[citation needed]

Also, it wouldn’t matter anyway: the climate impact of raising so many and feeding them carbon intensive grain is bonkers.

[hnmullany]

Well it's not a myth - but it is relatively minor compared to - say fossil fuel based power generation. Methane output is well documented - about 1lb a day for dairy cows and about half that for beef cows - without mitigation from additives.