[shafyy]

Globally, GHG emissions from livestock agriculture make up between 1/4 and 1/3 of all GHG emissions (depending on the source, but here's a good one: https://ourworldindata.org/environmental-impacts-of-food). And this does not take into account CO2 sequestered by land that is already converted to cultivated land (i.e. not natural vegetetation) - so the potential of additionally sequestering carbon is much higher.

That's right that Australia doesn't have a lot of natural forests, but even there natural vegetation is better at sequestering carbon than land that has been converted to be used for agriculture. But if you look at this map here [0], you'll see that Western Europe, South America, Southern Africa and South East Asia all have great potential to capture CO2 if we let the natural vegetation regrow.

> Most of the food livestock consume are leftovers of human-grade crops.

No it's not. Furthermore, from a protein and nutrition stand-point, the plants we grow today are enough to feed the whole world.

0: https://www.nature.com/articles/s41893-020-00603-4.epdf?shar...