This is addressing points from the several posts you've made here. 1. He was undoubtedly referring to greenhouse gas emissions, which are in the vicinity of 15% of all emissions globally -- more than every car, truck, train, ship and plane combined. http://en.m.wikipedia.org/wiki/Livestock's_Long_Shadow So yes, of all the environmental concerns, animal farming ranks very highly. I am not interested in having a discussion about climate change -- I am merely presenting the facts. Furthermore, 60% of the world's grain and 70% of soy are fed to livestock. If you understand trophic levels, you should see how inefficient this is. We get, at best, a 10% return from their meat. Thus it is not only an environmental concern, but a humanitarian one. 2. I hope your comment claiming "the universe intended" us to eat meat was purely rhetorical. If you actually believe such a claim, I am rather stunned, and suggest doing some research into the process of evolution. 3. The 5 nutrients in your link can all be obtained through fortified foods and supplements.