[tsimionescu]

> There is no amount of beef that is good for the environment.

With a low enough amount of cows bred in more traditional ways, there would be a cycle where an equivalent amount of carbon would be captured by plants vs what is excreted by the cow. That's why animal farming has not been a source of net CO2 for the thousands of years that we have been doing it before industrial times.

However, going back to historic sustainable levels means a drastic reduction in consumption of meat and dairy - probably a few times per year or something like that. Putting all livestock together, it would mean people could eat meat maybe once a month. Eggs and dairy may be a little more common, as those are collected throughout the life of the animal.