I mean, they'll be fucked just as much by climate change as the rest of us. That fact will not change once the real effects of climate change set in regardless of what definition they use.
Yeah, trying to make it about the environment is nice in theory, but all it means is that if it's environmentally friendly, these people will still be happy to abuse animals. I mean, sure, being good for the environment is a plus, but it's not the reason I don't eat meat or milk.
