So, I was saying ecosystems. Filling the world with cows is not the same as natural ecosystems.

Also, kurzgesagt did a pretty good episode on meat production (edit - they did several, but one was on the production demands in terms of energy and environment), and if I'm to trust their figures, the "cattle grazing exclusively on the pampas" is far from the majority of world cattle. If it was, that probably would be an improvement, esp if it was done in a way that allowed other species to exist too (maybe bring some buffalo back?). The percentage would be dramatically improved if finishing lots were eliminated though (still a minority though). So maybe that's a simple option. Plus, that's the cruelest part of the cow's existence.

https://ourworldindata.org/global-land-for-agriculture (crazy amount of habitable surface of planet is livestock) https://www.nature.com/articles/s41893-024-01398-4 (study on what percent of production is actually "low-intensity grazing on marginal land")

Again, not saying eliminate, just... reduce...