[dgax]

The article seems to focus more on instances where food production is a limiting factor. Land use is less of a problem in places where we have (collectively) enough food and people tend to focus more on the very serious environmental impact of large-scale agriculture. In the latter case, I would except a diet lower in meat to fare much better than the alternatives simply because it requires fewer acres to be farmed (or the same acres less often as the article points out) and thus has lower pollution output.