There's no reason to quibble carbon when there are other clear resource differences between food sources.
It takes a very large quantity of grain to produce the same mass of beef, as so much energy goes to powering the cow itself while it's alive. Same for water usage. Large animal farms are also reponsible for a great deal of run off pollution now not just from sewage and nitrates, but also antibiotic residue.
There's no question that raising animals for food is inefficient compared to agriculture.
It takes a very large quantity of grain to produce the same mass of beef, as so much energy goes to powering the cow itself while it's alive. Same for water usage. Large animal farms are also reponsible for a great deal of run off pollution now not just from sewage and nitrates, but also antibiotic residue.
There's no question that raising animals for food is inefficient compared to agriculture.