I heard something to do with Nitrogen and …cow farts(?) I am really unsure of this and would like to learn more.
Answer -
4 Parts
- Ethical reason for consuming animals
- Methane produced by cows are a harmful greenhouse gas which is contributing to our current climate crisis
- Health Reasons - there is convincing evidence that processed meats cause cancer
- it takes a lot more calories of plant food to produce the calories we would consume from the meat.
Details about the answers are in the comments
The line you mention is sentience, for many
Sure, so then they should instead be arguing that sentience is the morally correct line to draw.
You’ll find plenty of vegan debates about whether oysters are ethical to consume. It’s not some definite line in the sand drawn by a 2000 year old scripture, but rather it’s an ongoing debate that considers new evidence that results from advances in science and morality.