I'm not an expert, but my sense of the carbon sink is that the more soil there is the better, and grazing cows eating grass and leaving manure behind is buildin

I'm not an expert, but my sense of the carbon sink is that the more soil there is the better, and grazing cows eating grass and leaving manure behind is building soil and encouraging plant growth. The carbon released by the cows "emissions" is part of a carbon cycle, first captured by the grass and then released by bacteria in the cow's gut. The more grass, the more cows, the more carbon is hanging out somewhere other than the atmosphere.