The key is to farm or graze using regenerative methods. Current factory farming methods are detrimental to the soil and the rest of the environemnt in many ways. Bear in mind, however, that the largest contributor to greenhouse gasses is the healthcare sector, and that’s going to be a tough nut to crack.
It’s funny: the forum I help moderate has a strong contingent of zero-carb/carnivores, and their experience is the same, only in reverse. They get shamed for not eating plants. I guess the moral is that people will criticize us, no matter what we do.