However if the calories from your walk come from beef ...
100g of beef gives you 217 kcal [1], so you need 33g of beef for your walk
Carbon cost for beef is 99.48 kg CO₂e/kg [2]
So walking one mile fueled by beef creates ~3.3kg of carbon emissions, over 8 times what would be emitted if you drove
[1] https://www.healthline.com/nutrition/foods/beef#nutrition [2] https://www.statista.com/statistics/1201677/greenhouse-gas-e...