Welcome to Eco-Fascism, friend; the stupid masses consume nothing but lies from "environmentalists" who tell them that everything will be fine, and all we have to do is find "sustainable alternatives" so nobody has to change anything and we can keep consuming, and consuming, and consuming, and having more and more children who consume more and more resources but everything is fine! Green energy! It fixes everything! Or so I'm told.
Morals aside, we want REAL science, not whatever studies get pushed past flexible researches more interested in keeping their jobs than speaking out. And we want facts. The fact is, in populations as large as ours, there is no way for us all to consume as much as we like, and we're better off limiting ourselves, before we reach the limits of the entire Earth, because that is a very hard, painful wall to run into, much more so than slowing yourself down gradually before impact.
Cows, pigs, whatever, consume more food than we get back from them. So just be smart, and stop wasting time and resources on it. It's not just the amount of food they consume that is the problem–it's the type of food too–corn in particular. During the growing season the US corn-belt is the most active region of photosynthesis in the entire world. Corn has shallow roots, it doesn't anchor oil at all, and over time, massive amounts of fertile soil have been eroded by winds alone and moved into the bottoms of rivers where we can't use it, essentially the growing regions of the midwest are on track to becoming another dustbowl, because the government subsidizes a seemingly unlimited number of corn crops, but not polycultures with mixes of deep-rooting plants that hold soil in place. Woody perennial polycultures provide much, much, much more nutritional content than fields of corn fed to animals anyway.
Grazing works fine in unpopulated countries like New Zealand where they have great fields for cattle to graze in, but the ecosystems in the US plains for example, are much more delicate, and rainforests in South America are burned to the ground to make room for expanding cattle herds there. Like I said, in large populations, livestock don't work. They simply aren't worth it.
So, what do we do? we pull the rug out from under their feet. Hack away at government subsidies to corn farmers, tax meat and dairy products into oblivion–yes I include seafood in this, there are dozens of nitrogen-flooded deadzones in our waters because of it and many regions are in critical danger of overfishing, there's almost nothing to discuss about it. The fat, idiotic masses, whose healthcare costs keep going up and up because they eat animal products laced with antibiotics out the ass, whose blood pressure keeps going up and up, whose rates of obesity and diabetes keeping going up and up, can suck it up and deal with REALITY.
The only choices that are protected by freedom are INFORMED choices. And if they can't make informed choices, then that's all she wrote, end of story, they are irrelevant and burdensome.