this post was submitted on 31 Dec 2023
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[–] [email protected] 15 points 10 months ago* (last edited 10 months ago)

Not the person you are replying to, but it should be noted that synthetic fertilizer usage is lower on plant-based diets even compared to maximal usage of manure. This is due to the fact that you don't have to grow so much animal feed (which you lose most of the energy from by other creatures body functions using that energy themselves)

shifting from animal to plant sources of protein can substantially reduce fertilizer requirements, even with maximal use of animal manure

https://www.sciencedirect.com/science/article/abs/pii/S0921344922006528

While any food production is not going to be free of environmental effects, plant-based diets are substantially better on nearly all metrics