60M is possibly double the population there ever was, and that was a time when far, far more land was devoted to them. The only way to have that many now would

60M is possibly double the population there ever was, and that was a time when far, far more land was devoted to them. The only way to have that many now would be an extremely concentrated population (with its methane output) plus all the other outputs of humanity. There is no single answer about what we're "supposed to" do, but it is clear that cattle are driving the increase of methane production and that methane is a far, far more potent greenhouse gas than C02. A plant-based replacement wins hands-down in any ecological analysis.