Someone on another forum posted this carbon footprint of meat substitutes article. Of note, the article came out before the current generation of vegan meat imposters:
The average impact across all types of meat substitutes was 2.4 kilograms of CO2 equivalent per kilogram of product. Comparable stages of production in the meat industry are estimated to generate between 9-129, 4-11, and 2-6 kilograms of CO2 equivalent per kilogram of product for beef, pork and chicken, respectively. Among meat substitutes, mince, nuggets, slices, rolls and sausages were associated with the lowest emissions, while veggie burgers were associated with the highest emissions, at 4.1 kilograms of CO2 equivalent per kilogram of product.
https://www.sciencedaily.com/releases/2 ... 170427.htm