Are there any reliable numbers on the holistic impact of ruminants? All of the carbon they emit came from the atmosphere via their plant diets, and a huge volume of that carbon is sequestered in the soil via their excrement. Ruminants help the soil, as opposed to modern agriculture which is largely reliant on fossil fuel derived fertilizer.
I have yet to see a paper that models this. Most of the estimates are purely based on output, which seems disingenuous at best.
In Denmark the pigs are fed soy imported from areas of the world where rainforests had to be cut down to make room for production. The short distance between Danish fields and sea, which is no where greater than 50kms, means most fertilizer from the pigs runs off into the sea, causing algae blooms that kill all other marine life.
I have yet to see a paper that models this. Most of the estimates are purely based on output, which seems disingenuous at best.