I guessed this was a sub-toot (and found the relevant thread you replied to); not weighing in there.
In any case, animal agriculture is one of the largest contributors to climate change. But whenever vegans like myself point that out, we're told that our personal consumption habits don't make a difference as long as multinational corporations keep doing yadda yadda whatever, I don't have the strength to argue back. I'm a vegan for ethical reasons first and foremost anyway.