The Carbon Footprint of Popular Diets

The keto diet was, I think it was almost three kilograms of carbon dioxide per thousand calories. Beef produces 31 times more greenhouse gas emissions than tofu. It uses 18 or 20 times more water and had it having a whole lot more. So I did, I feel quite strongly about that. But if you look at the ecological argument, there was a study that actually looked at the carbon footprint of popular diets.