I agree with what avar is saying above and in the sibling thread. > producing any type of meat consumes excessive amounts of land vs other forms of producing f

I agree with what avar is saying above and in the sibling thread. > producing any type of meat consumes excessive amounts of land vs other forms of producing food I think this is quite different from CO2 and pollution, which I'd agree are true externalities. I'm not sure I follow " how do you classify 'land' as an externality" though. Why is it an externality? It is a good that has a price. It sounds like you're believe that there's something inherently bad about meat consuming more land to produce than other types of food. But I think to first approximation, the free market just sorts that one out; if there were other uses for that land that were more profitable on a per-acre basis, then you'd expect land-owners to convert to those uses.