Phosphorus retrieval - relocating it from relatively poor land that is acceptable for low-density infrequent grazing, but unsuitable for intensive agriculture -

Phosphorus retrieval - relocating it from relatively poor land that is acceptable for low-density infrequent grazing, but unsuitable for intensive agriculture - and returning it to the more intensely farmed areas of a human habitation, is one of the key benefits Simon Fairlie describes in his book[1] for the keeping of large grazing animals (even if they're not primarily kept for meat consumption). I have a very small sample set, but I've yet to meet a vegan that's aware of the phosphorus cycle problem. The only alternative to grazing / foraging animals (and as per TFA I'm happy to include humans in that category) is to employ large amounts of infrastructure and energy, and it's not even clear how long that would work. [1] https://www.goodreads.com/book/show/9251480-meat https://www.goodreads.com/book/show/9251480-meat