[1] Assuming I replace 250 kcal from pork per day with Tofu (around 100g of pork which seems to be considered "one serving"), this would be savings of ~1 kg CO2e per day: https://ourworldindata.org/grapher/ghg-kcal-poore

I think most people get more than 250kcal a day from meat. Seems like a strong argument to go vegan to me.