[mealkh]

How are bison different compared to grazing cattle? I am not thinking of factory farmed where dung and urine are getting mixed together (if I remember correctly, that combination causes some reaction that is particularly climate-unfriendly?). Rather, imagine the kind of large herds in Argentina, Paraguay... So cows that eat grass and poop randomly in the wild, not cows that get rainforest soy / endless amounts of cereals.

Do they have different biology, different interactions? Or is a numeric thing, where after a certain point the effect flips and they become a net "negative" (maybe required infrastructure, all the activities surrounding it rather than the animals themselves)?

Or is it actually so that grazing cattle and bison have similar effects, and the old "raising animals is very bad for the climate" is not universally true (and should be corrected to "some ways of raising animals are bad for the climate" or "raising animals is bad for its pollutants")?

I am confused!