Firstly, I think the article is very informative, I’ve been researching this topic extensively. However, I found the two paragraphs concerning social, economic and environmental sustainability irrelevant, since the effects of the diet are what’s at hand. PETA is not a scientific or medical organization and their unfortunately skewed opinions have nothing to do with nutrition or the effects of a carnivore diet. Moreover, methane production of cattle is also irrelevant, and there’s no substantive proof that cattle has any actual effect on the environment, which is alien to the supposed point of this article. And though you have superscripts 16 and 17 noted here, they’re not to be found in the end notes supporting your claim. This article is brilliant without the social and environmental irrelevancies. I would stick to the nutritional point.