If we care about the ethical side, we really should not be advising switching to poultry or other meats. The number of chickens or other animals slaughtered per kg are far higher because of their lower slaughter weight. This comes with tons of other environmental and disease problems from the super high concentration of chickens and other birds. The emissions are also still quite high for poultry, it’s just beef is extremely high

Reduction of meat consumption overall should be the better aim instead