Conservation of mass?
Do they understand that producing energy and fertilizer using the bodies of animals is less efficient than producing the same number of calories or mass of nitrates from plants+less-energy-than-is-required-to-raise-the-animal-in-question?
I don’t know if it’s all of them, but I know someone who said that veganism is actually more harmful for the planet because plants need pesticides and fertilizer, which kill bugs. It took no effort to challenge them on that at all.
There’s an element of truth here, in that parts of the world have a system where farm animals eat stuff humans can’t, such as wild grass, kitchen waste and straw. But modern ‘factory farms’ do use insane amounts of growth su0lements and medicines, which are just as bad.
The carbon, nitrogen, etc. contained in that grass, waste, and straw should be buried in/returned to the soil to grow plants instead of being farted into our atmosphere. Assuming the land in question is arable in the first place (which I think is valid if it’s producing enough plant matter for grazing to be viable), if managed at all would produce more calories of human-compatible nutrition per calorie invested than harvesting of grazing animals on said land would.
There’s land that isn’t good enough to grow crops, but is good enough for wild plants to grow. You can, as you said, ‘manage’ it - give enough fertiliser and water to make it suitable for agriculture. But that is often unaffordable for the people living in such places, so using animals to gather and concentrate the available nutrients is the best option available to them.
That’s an orthogonal injustice though, no? Collectively, our species massively overproduce food, so I would think the fact that there is a prior reason to be trying to cultivate land like this, which ought to be managed for native flora/fauna is a separate and solvable large scale land allocation problem, the solution to which frees whatever livestock use the argument excuses.
Sounds like my coworker who argued that veganism kills more animals than meat does, due to the pest control measures that might be necessary to protect crops.
As if pest control isn’t a thing in the meat industry from the feed crops, to the feed lots, to the barns to the slaughterhouses. They think the cattle that made the steak they’re eating just materialized out of thin air or something and didn’t require a shit ton of energy and resources to grow it.
Yep, that exact point.
What do they think livestock eat?
pesticides and fertilizer!