I am aware of the objections coming from vegans, I really have nothing to say to them other than I am in favour of freedom of worship, but I am also an atheist who tries to stand on the side of the scientific method as much as my abilities allow me, so I think National Geographic and PNAS are a more reliable source of information.
https://www.nationalgeographic.com/environment/article/insec...
https://www.pnas.org/doi/10.1073/pnas.2023989118
Most importantly: loss of vegetable specie due to mono cultures farmed specifically for humans (tomatoes for burgers, for example - McDonald's is one of the biggest, if not THE biggest, purchaser in the world of potatoes, lettuce and tomatoes - or avocados for fancy sandwiches, that consume 300 liters of water to produce a single fruit) is not be underestimated.
As an example, this sentence
> vegans are inflicting far less damage because most of the cereal crops that are mono-cropped (wheat, corn, soy, etc.) are fed to the animals people consume.
is almost completely made up and numbers are greatly exaggerated for propagandistic purpose.
The reason why original Parmigiano cheese is so worshipped by Italians and it's so expensive abroad, is exactly because cows are not fed with crops, bu with natural grass.
The reason why in USA many animals are fed with farmed crops is because crops are subsidized by the govt, making them cheaper than the alternatives.
Another reason why herbivores are fed with crops is because they can eat the remains we can't eat, which is around 85% of the whole plant
https://images.squarespace-cdn.com/content/v1/5caca181348cd9...
According to FAO (United Nations Agency for food) "only 13% of global animal feed (all animals for food, including chickens, pigs and cattle) is comprised of grain crops"
https://www.sciencedirect.com/science/article/abs/pii/S22119...
Crops are also heavily subsidized to produce bio fuel, which is not great, I agree, but that has nothing to do with feeding animals or eating their meat.