Here is a really great article that covers a lot of ground in terms of what food is most efficient for protein both in terms of land & CO2. https://ourworldind

Here is a really great article that covers a lot of ground in terms of what food is most efficient for protein both in terms of land & CO2. https://ourworldindata.org/yields-and-land-use-in-agriculture#land-use-by-food-type https://ourworldindata.org/yields-and-land-use-in-agricultur... EDIT: sorry here is the better link: https://ourworldindata.org/meat-and-seafood-production-consumption#efficiency-of-meat-production https://ourworldindata.org/meat-and-seafood-production-consu...