Cows are literally one of the least calorie-per-CO2 efficient means of getting meat. Here's some actual data: https://ourworldindata.org/grapher/ghg-kcal-poore

Cows are literally one of the least calorie-per-CO2 efficient means of getting meat. Here's some actual data: https://ourworldindata.org/grapher/ghg-kcal-poore https://ourworldindata.org/grapher/ghg-kcal-poore You'll note that beef is by far the worst. Here's one that better describes the components of that CO2 footprint (whether it's methane production, or transport overhead, etc.): https://ourworldindata.org/food-choice-vs-eating-local https://ourworldindata.org/food-choice-vs-eating-local