Beef is the worst. Avoid ruminants because of their methane release (cow burps are 25x more potent a ghg than co2). Also look at the feed to weight ratio for an

Beef is the worst. Avoid ruminants because of their methane release (cow burps are 25x more potent a ghg than co2). Also look at the feed to weight ratio for animals, cows are like 6:1 whereas chicken is 1.5:1, and chicken don't release substantial methane. Pork is about 4:1. Rabbit is about 3:1 and has a very fast time to cull.