Perennials combined with animals can be made into a much more self-sustainable cycle.
Be careful with numbers, they can be useful but fail to show the full picture at the same time.
I've heard that one about "the annual crops" before, and it's simply not true that it's "the" alternative. It's claimed in this one study that's echoed in loads of articles[0][1][2][3] that assumes that vegans don't eat perennials, which is kind of ignoring the existence of apples, apricots, asparagus, artichoke, avocados, broccoli, currants, basil, blue- and blackberry, chives, fennel, garlic, ginger, grapes, kale, kiwis, leek, mint, onions, oregano, pears, persimmons, pineapples, plums, pomegranates, potato, rasp- and strawberries, radish, rhubarb, rosemary, sage, thyme, tomatoes for a start.
This view about animal husbandry being harmless for the environment has been disproven[4][5][6], and is on the line with global warming denialism.
[0]: http://qz.com/749443/being-vegan-isnt-as-environmentally-fri...
[1]: http://www.pbs.org/wgbh/nova/next/earth/going-vegan-isnt-act...
[2]: http://www.foxnews.com/health/2016/08/11/new-study-reveals-v...
[3]: https://quietkinetic.wordpress.com/2017/03/09/global-veganis...
[4]: https://www.theguardian.com/environment/2008/sep/07/food.foo...
[5]: http://www.cowspiracy.com/facts/
[6]: https://www.theguardian.com/environment/2014/dec/03/eating-l...
There are a ton of lines I could go to discuss your points, from "meat is not equal to beef" to "could one live healthily only on the things you listed?" (hint: no).
I see tons of articles with statements of journalists but no real evidence, if you want to discuss with references I suggest going to better sources. Actually, I suggest checking your references as well - this was written on [4]:
"[a major report into the environmental impact of meat eating claimed] eating some meat was good for the planet because some habitats benefited from grazing."
So yeah, even your references "disproving" what I'm saying are actually are actually agreeing with me to a certain extent.
Last, but not least, it's not about who eats what but about sustainable systems - either the system works as a cycle or it will eventually run off. You need to look at the bigger picture.
