Chicken, for example, produces 10% of CO2 per kg of meat compared to beef.
But mainly, beef and meat is not the same, cattle needs way more ressources than chicken for example, or well, insects.
Also dairy is not a meat.
Hardest part is knowing implicit animal ingredients you might not otherwise guess, which almost tripped me up when I visited the US and (as a vegetarian*) almost bought some yogurt before reading the ingredients list and finding to my surprise that it contained gelatine.
* it's mainly the cheese; I've substituted out other uses of milk. Also, vegan yogurt is a thing now, not sure when that happened, before or after that visit.
Just looked up the Wikipedia page to check on vegan, and… looks like all the animal and plant "sources" actually ingest the stuff from elsewhere?
Since only bacteria and some archea possess the genes and enzymes necessary to synthesize vitamin B12, plant and algae sources all obtain the vitamin secondarily from symbiosis with various species of bacteria,[5] or in the case of fermented plant foods, from bacterial fermentation.[86]
The mean human has approximately one ovary, one testicle. A few hundred million Indians refusing all meat is compatible with the others not doing that.
https://www.pewresearch.org/religion/2021/06/29/religion-and...