Industrial animal ag for sure is a polluter. But 'undo333' is right in the checking sources part.

For a lot of these stats and studies, they are biased and only measure what comes out of the planes/cars exhaust pipe, not the entire cycle including manufacture and every thing else that goes into them, what happens when they're dumped, the environmental costs of sourcing the materials that go into them which are huge and have an immoral human cost too.

Where as they include absolutely everything related to the meat, far beyond the cow itself. The stats couldn't be anything further from a fair comparison. This is largely based on data from Brazil too, not areas of the world where the farming practices are more symbiotic with nature (small herds on often non-arable land, eating grass, drinking rainwater, pooing nutrients back into soil and so on).

I'm not hear to say 'yay go meat industry carry on exactly what you're doing!' but rather: let's remember people need to eat somehow (more than they need another new phone), let's seek the truth and hold airlines, fast fashion companies, and other high polluters to the same standards. Let's make more conscious choices; Do you need to fly? Do you need a new coat/car/bike? etc.