Cereals and carbohydrates had the smallest footprints, with each pound of food releasing only 3 lb of greenhouse gases and almost no nitrogen pollution.

谷物和碳水化合物的足迹最小，每磅食物只释放3磅温室气体，几乎没有氮污染。

youdao

noting that cows produce 13 to 30 lb. of carbon dioxide per pound of meat.

他还提到，牛每长一磅肉，要产生13到30磅的二氧化碳。

youdao

noting that cows produce 13 to 30 lb. of carbon dioxide per pound of meat.

他还提到，牛每长一磅肉，要产生13到30磅的二氧化碳。

youdao