I didn't go to that grocery store. I went to one that didn't give a fuck.
killing the cows won't stop uneaten grass from releasing the same amount of CO2
Dead grass rots you know
Indeed, it is also derived from methane breaking down in the atmosphere.
Also sauce on cow farts for those that care.
https://www.cbc.ca/radio/quirks/mar-2-2019-the-goodness-paradox-secrets-in-poop-converting-carbon-to-coal-and-more-1.5037008/do-cows-produce-more-methane-than-rotting-grass-1.5037019