Fair enough, but that doesnt say anything about the concept of eating meat.
Ok, but nowhere did I say that we needed to focus solely on the concept.
Also, do you eat meat created using standard industrial farming practices? If so, why?
Is it always unethical to damage the environment or is there a treshold?
Well of course there's a threshold, but I don't think its any big indictment against the environment argument to say that the threshold is fuzzy. If you think anything is permissible that admits of shades of grey and fuzziness, then nearly everything is permissible.
Obviously wrong damage to the environment: Turning earth into a nuclear wasteland for the amount of utility you get from eating a chocolate bar.
Obviously justified damage to the environment: Chopping down one tree to save a billion lives.
And in between somewhere is meat-eating's environmental impact. I'm not well-versed in the empirical literature on this, but my vague understanding is that mass meat production (particularly given the types of meat we tend to eat, resource-intensive stuff like corn-fed cows) is one of the most environmentally harmful things we practice. It takes massive amounts of water, land, and energy to produce meat, compared to what it would take to produce equivalent calories of non-meat food. If I'm wrong on this, I'm happy to be enlightened by someone who knows the literature better than me.
Also, define damage to the environment.
I probably can't give necessary and sufficient conditions for what constitutes damage to the environment, but I don't think I need to either. One type of damage would be using much more resources than necessary to achieve a desired end. Another would be , say, poisoning water with farm runoff, though I'm much less convinced by those sorts of considerations (that is, I'm not convinced farm runoff is a super big deal).
If there is a treshold, it would be negotiable where that is, i think this would make it a political issue then, rather than a philosophical one.
It would be a philosophical issue to determine the criteria for putting a threshold somewhere, it would be a political issue to determine implement a policy for the actual practice of meat production.
An accidental outcome that is not intrinsic to vegetarian vs meat-eating debate. In some countries, animals are raised on unwanted land etc and so are good for the environment.
Thus, arguing that animals should or should not be killed because it is good or bad for the environment is an accidental and unconnected argument. It does not follow that it is moral to kill animals if it could be shown to be good for the environment.
You are correct that it is accidental and unconnected to the
intrinsic wrongness of killing and eating animals, but then so is the pain issue.
But it isn't unconnected to the debate in general, obviously, and I see no reason why we ought to restrict ourselves to the intrinsic wrongness. I certainly didn't stipulate as such in the OP.
Ethically, animals have either been created by God to serve as food for us, or we have evolved to use them as prey. Therefore eating meat is part of human nature and in that respect ethical.
Ignoring the irrelevant God option, just because its natural to do something doesn't mean its ethical to do that thing.