Considering that "Each year, 50 billion animals are raised and slaughtered in factory farms globally. Over a billion animals live in factory farms at any point of time in the United States. Most experience serious levels of suffering.", I would argue that it's hard to find anything comparable in magnitude to that tragedy if one allows that farmed animals are even a 1/100th fraction as conscious as humans.
I would... probably not enjoy being proven wrong this time :S
I'm just going to refer to the factory farming article from 80000hours:
https://80000hours.org/problem-profiles/factory-farming/
Considering that "Each year, 50 billion animals are raised and slaughtered in factory farms globally. Over a billion animals live in factory farms at any point of time in the United States. Most experience serious levels of suffering.", I would argue that it's hard to find anything comparable in magnitude to that tragedy if one allows that farmed animals are even a 1/100th fraction as conscious as humans.
I would... probably not enjoy being proven wrong this time :S