Various sources put beyond burgers at less than a kg of co2 per kg of food, whereas turkey is close to 20kg of co2 per kg of meat.

The thing with plant based meat is that even with processing, it’s virtually impossible to come close to farmed meat in terms of water, energy, and feed. Since the animals eat the plants their meat is compared to, they will have eaten the equivalent of what they’re being compared to in a very short period of time to begin with. Then you are comparing the processing and delivery carbon which is negligible in the scheme of things.

People (even very intelligent people) often seem to estimate the carbon footprint of plant based diets incorrectly by several orders of magnitude.

Where are you getting that from? Other data suggests that even worst case production of plant sources of protein come out far ahead of even the best case production of meat, dairy, etc.

> plant-based foods emit fewer greenhouse gases than meat and dairy, regardless of how they are produced. > […] > Plant-based protein sources – tofu, beans, peas and nuts – have the lowest carbon footprint. This is certainly true when you compare average emissions. But it’s still true when you compare the extremes: there’s not much overlap in emissions between the worst producers of plant proteins, and the best producers of meat and dairy.

https://ourworldindata.org/less-meat-or-sustainable-meat

Source please.