You are quite correct. There are some mitigating circumstances though. The biggie is that all of this food is, in theory, carbon neutral; plants require CO2 to

You are quite correct. There are some mitigating circumstances though. The biggie is that all of this food is, in theory, carbon neutral; plants require CO2 to grow. While obviously this does not apply to the tractors, trucks, cargo ships etc in the rest of the preparation chain, that goes for fossil fuels as well - and chances are the fossil fuels have had to come farther and undergo even more processing. Nor are the emissions of the supply chain intrinsic to the fuel: we could theoretically replace all those tractors with electric ones powered by solar etc... The other factor is that we can exert a great deal of personal agency over the emissions content of the food we eat. Cows, which you mention, are particularly bad because, although carbon-neutral, they effectively turn CO2 into methane which is a far more potent greenhouse gas. But we don't have to eat cows. Or food from the other side of the world. You can even grow your own food if you really want. So human-powering things reclaims personal responsibility.